Expand Photo Beyonce, Jay-Z Beyonce wore subtle sheer and crystals by Givenchy. Photo: 2015 Kevin Mazur

Expand Photo Rihanna Rihanna stayed cozy in a Guo Pei gown and shoes by Christian Louboutin. Photo: 2015 Getty Images

Expand Photo Sarah Jessica Parker The headdress that launched a thousand memes. (It's Philip Treacy, by the way.) Photo: 2015 FilmMagic

Expand Photo Kanye West, Kim Kardashian Per usual, Kim Karadashian went for see through, this time in Peter Dundas for Roberto Cavalli. Photo: 2015 Ge... more Kanye West, Kim Kardashian Per usual, Kim Karadashian went for see through, this time in Peter Dundas for Roberto Cavalli. Photo: 2015 Getty Images

Expand Photo Lady Gaga The singer went for a royal robe custom by Alexander Wang, with a crown to match. Photo: 2015 Getty Images

Expand Photo Jennifer Lawrence The co-host and face of Dior opted for a cutout Raf Simons design. Photo: 2015 FilmMagic

Expand Photo Madonna The singer isn't above self promotion, her Moschino gown read 'Rebel Heart', the name of her newest album. Photo: 2015 Getty Images

Expand Photo Miley Cyrus Miley Cyrus promoted her buddy Alexander Wang in a studded gown. Photo: 2015 Getty Images

Expand Photo Jennifer Lopez Side butt courtesy of Versace. Photo: 2015 Getty Images

Expand Photo Katy Perry The singer was a walking mural by Moschino. (Purse for on site touch ups.) Photo: 2015 Getty Images

Expand Photo Mary Kate, Ashley Olsen The sisters matched in their full-on goth glamour attire in vintage Dior by John Galliano.

Expand Photo Robert Pattinson, FKA Twigs FKA Twigs was all legs in Christopher Kane body cut outs. Photo: 2015 Getty Images

Expand Photo Zoë Kravitz The singer wore a chain mill gown by Alexander Wang. Photo: 2015 Getty Images

Expand Photo Rita Ora Rita Ora's red gown is Tom Ford. Photo: 2015 Getty Images

Expand Photo Cara Delevingne The model created the illusion of body tattoos with her Stella McCartney jumpsuit. Photo: 2015 FilmMagic

Expand Photo Kendall Jenner The new face of Calvin Klein Jeans eschewed denim for a Collection look in sparkly green. Photo: 2015 Getty Images

Expand Photo Solange Knowles Erasing any memories of Met Galas past in a Giles Deacon design that is what fashion people would call "directional." H... more Solange Knowles Erasing any memories of Met Galas past in a Giles Deacon design that is what fashion people would call "directional." Her shoes were by Christian Louboutin. Photo: 2015 Getty Images

Expand Photo Jenna Lyons Jenna Lyons opted for cozy pajamas by J.Crew. Photo: 2015 Getty Images

Expand Photo Zac Posen, Katie Holmes Her brand-new bob made news, but Katie Holmes's Zac Posen gown, with a fanciful cloud motif, was a headliner in its... more Zac Posen, Katie Holmes Her brand-new bob made news, but Katie Holmes's Zac Posen gown, with a fanciful cloud motif, was a headliner in itself. Photo: 2015 Getty Images

Expand Photo Justin Bieber Enter the dragon: The never-shy singer went full theme in an embroidered Balmain jacket. Photo: 2015 Getty Images

Expand Photo Cher What becomes a legend most? A sequined Marc Jacobs look (and the designer himself on one's arm).

Expand Photo Allison Williams The other A-Dubs was a walking flamenco-girl emoji in one of her favored designers, Giambattista Valli.

Expand Photo Anne Hathaway Hathaway's hooded, gilded Ralph Lauren proved to be one of the most divisive looks of a love-it-or-hate-it evening.

Expand Photo Amal Clooney John Galliano's work for the freshly renamed Maison Margiela got a red-carpet outing on Amal Clooney — who skipped the gloves this g... more Amal Clooney John Galliano's work for the freshly renamed Maison Margiela got a red-carpet outing on Amal Clooney — who skipped the gloves this go-round.

Expand Photo Joshua Jackson, Diane Kruger In Chanel Couture, Diane Kruger made the dress-over-pants trend look uncharacteriscally haute. Her date opted for Al... more Joshua Jackson, Diane Kruger In Chanel Couture, Diane Kruger made the dress-over-pants trend look uncharacteriscally haute. Her date opted for Alexander McQueen. Photo: 2015 Getty Images

Expand Photo Chloë Sevigny Always one to support a young designer, the style rebel wore a custom look by J.W. Anderson. Photo: 2015 Getty Images

Expand Photo Kerry Washington The Scandal star favors unabashedly feminine red-carpet style, and this pink Prada dress (accessorized with Harry Winston jewels... more Kerry Washington The Scandal star favors unabashedly feminine red-carpet style, and this pink Prada dress (accessorized with Harry Winston jewels) is another win in her playbook. Photo: 2015 Getty Images

Expand Photo Kate Hudson Hudson took a page from the awards-show playbook and went for head-to-toe gilding from her good friend Michael Kors. Photo: 2015 Get... more Kate Hudson Hudson took a page from the awards-show playbook and went for head-to-toe gilding from her good friend Michael Kors. Photo: 2015 Getty Images

Expand Photo Sienna Miller A daring take on suiting, courtesy of Thakoon, paired with shoes by Christian Louboutin. Photo: 2015 Getty Images

Expand Photo Lee Daniels, Naomi Campbell Naomi Campbell chose a green gown by Burberry. Photo: 2015 Getty Images

Expand Photo Dakota Johnson Leaving prim Anastasia Steele in the dust, Johnson went full Barbarella in a metallic Chanel mini.

Expand Photo Joan Smalls The model's one shoulder gown is Roberto Cavalli by Peter Dundas. Photo: 2015 Getty Images

Expand Photo Rose Byrne The actress's plunging neckline is by Calvin Klein Collection. Photo: 2015 Getty Images

Expand Photo Erdem Moralioglu, Alexa Chung Alexa Chung went for a strapless Erdem satin gown. Photo: 2015 Getty Images

Expand Photo Cassie Ventura, Sean Combs Cassie's side slit dress is by Zuhair Murad. Photo: 2015 Getty Images

Expand Photo Grimes The musician went for Louis Vuitton animal print. Photo: 2015 Getty Images

Expand Photo Jessica Alba The actress chose a side slit Kenzo gown. Photo: 2015 Rabbani and Solimene Photography

Expand Photo Linda Evangelista Photo: 2015 FilmMagic

Expand Photo Jamie Bochert Photo: 2015 Getty Images

Expand Photo Maggie Gyllenhaal The actress's cut out gown is Roland Mouret. Photo: 2015 Getty Images

Expand Photo Chrissy Teigen, John Legend Chrissy Teigen kept it simple, but sparkly, in St. John. Her date went for a Gucci tux. Photo: 2015 FilmMagic

Expand Photo Zendaya Zendaya wore a party in the back by Fausto Puglisi. Photo: 2015 Getty Images

Expand Photo Emily Blunt The actress's powdery cape gown is custom Prada, she paired it with shoes by Christian Louboutin. Photo: 2015 Getty Images

Expand Photo Hailey Baldwin Photo: 2015 FilmMagic

Expand Photo Carey Mulligan Photo: 2015 Getty Images

Expand Photo Dwayne Wade, Gabrielle Union Union accessorized her eggplant-hued Zac Posen gown with Gemfields jewels, while her husband was extra-traditional, ... more Dwayne Wade, Gabrielle Union Union accessorized her eggplant-hued Zac Posen gown with Gemfields jewels, while her husband was extra-traditional, in white tie with decorations and jewels by Buccellati. Photo: 2015 Getty Images

Expand Photo Liya Kebede Another proponent of the dress-over-pants look, the model opted for a silvery 3.1 Phillip Lim design. Photo: 2015 Getty Images

Expand Photo Reese Witherspoon The actress went for a tube gown by Jason Wu. Photo: 2015 Getty Images

Expand Photo Alicia Keys The singer went totally '80s in a Jean Paul Gaultier crinoline. Photo: 2015 Getty Images

Expand Photo Selena Gomez Another attendee who got the complex-headdress memo: Selena Gomez, in a more-runway-than-Coachella-worthy flower crown. Her suspende... more Selena Gomez Another attendee who got the complex-headdress memo: Selena Gomez, in a more-runway-than-Coachella-worthy flower crown. Her suspender-effect gown? Vera Wang. Photo: 2015 Getty Images

Expand Photo Karlie Kloss, Gigi Hadid Model Gigi Hadid wore shoes by Christian Louboutin. Photo: 2015 Getty Images

Expand Photo Lisa Bonet, Lenny Kravitz Photo: 2015 Getty Images

Expand Photo Hailee Steinfeld She wasn't around for the '90s peak of the apron dress, but Steinfeld tried out a Michael Kors version of the revived trend, acc... more Hailee Steinfeld She wasn't around for the '90s peak of the apron dress, but Steinfeld tried out a Michael Kors version of the revived trend, accessorized with bold Wonder Woman–style double bangles. Photo: 2015 Getty Images

Expand Photo Lorde Lorde loves a suit, but she traded out her menswear-inspired signature for a midnight-blue Calvin Klein gown. Photo: 2015 Getty Image... more Lorde Lorde loves a suit, but she traded out her menswear-inspired signature for a midnight-blue Calvin Klein gown. Photo: 2015 Getty Images

Expand Photo Usher The singer paired his cane with a Calvin Klein tuxedo. Photo: 2015 Getty Images

Expand Photo Uma Thurman While "Grecian goddess" was not the theme of the night, Thurman is making us wish it were. Photo: 2015 Getty Images

Expand Photo Kristen Wiig The comedian was a palate cleanser in sorbet-hued Prabal Gurung.

Expand Photo Amanda Seyfried Making her way into the Givenchy fam in a high-necked, textured number.

Expand Photo Miranda Kerr Photo: 2015 Kevin Mazur

Expand Photo Keri Russell While it wasn't particularly on-theme, Russell's leg-baring, feathered Altuzarra gown was a stunner, accessorized with Ana Khouri ea... more Keri Russell While it wasn't particularly on-theme, Russell's leg-baring, feathered Altuzarra gown was a stunner, accessorized with Ana Khouri earrings. Photo: 2015 Getty Images

Expand Photo Julianne Moore In a subtle nod to the theme, Moore wore fan-embellished Givenchy.

Expand Photo Imogen Poots Black lace Alberta Ferretti made for a romantic effect on the Brit actress. Photo: 2015 Getty Images

Expand Photo Lily Collins The newly pixie-shorn starlet set off her Chanel couture look with a miniature veil. Photo: 2015 Getty Images

Expand Photo Neil Patrick Harris, David Burtka The pair wore matching white-tie-and-tails looks. Photo: 2015 Getty Images

Expand Photo Chloë Grace Moretz Youthful? Fun? Unaffected? Moretz ticked all the boxes in playful Coach. Photo: 2015 FilmMagic

Expand Photo Jessica Hart The Aussie model wore an Asian-inspired look by Valentino, a Charlotte Olympia cat clutch, and jewelry by Sutra and Carrera y Carrer... more Jessica Hart The Aussie model wore an Asian-inspired look by Valentino, a Charlotte Olympia cat clutch, and jewelry by Sutra and Carrera y Carrera. Photo: 2015 Getty Images

Expand Photo Kris Jenner Photo: 2015 FilmMagic

Expand Photo Ruth Wilson Photo: 2015 FilmMagic

Expand Photo Taraji P. Henson, Alexander Wang Evidently, the Balenciaga designer is an Empire fan — he picked the star as his date and dressed her in a subdue... more Taraji P. Henson, Alexander Wang Evidently, the Balenciaga designer is an Empire fan — he picked the star as his date and dressed her in a subdued strapless look of his design. Photo: 2015 FilmMagic

Expand Photo Sofia Vergara, Joe Manganiello If it ain't broke ... Vergara is a fan of the sweetheart neckline, and this Marchesa stunner suits her.

Expand Photo Miguel A sharp red suit made a nice contrast from the abundance of white-tie-and-tails looks. Photo: 2015 Getty Images

Expand Photo Emily Ratajkowski The bombshell covered up in embellished Topshop. Photo: 2015 Getty Images

Expand Photo Liu Wen The model wore a floral lace Michael Kors gown. Photo: 2015 Getty Images

Expand Photo Jessica Chastain The redhead went full-on Old Hollywood in glittering Givenchy and jewels by Piaget. Photo: 2015 Getty Images

Expand Photo Aaron Rodgers, Olivia Munn The Newsroom star certainly stood out in ombré J. Mendel and Cindy Chao jewels. Photo: 2015 FilmMagic

Expand Photo Dave Franco The actor wore shoes by Christian Louboutin. Photo: 2015 FilmMagic

Expand Photo Jaime King The actress wore jewels by Forevermark. Photo: Dimitrios Kambouris/Getty Images/Courtesy of Forevermark Diamonds

Expand Photo Adriana Lima Photo: 2015 Getty Images

Expand Photo Janelle Monae The singer's sweeping cape could double as attire for the Costume Institute's previous "Superheroes" exhibit. Photo: 201... more Janelle Monae The singer's sweeping cape could double as attire for the Costume Institute's previous "Superheroes" exhibit. Photo: 2015 Getty Images

Expand Photo Claire Danes Gothic glamour was the order of the day for Danes, who paired Valentino with inky lipstick.

Expand Photo Lizzy Caplan The actress officially put all memories of Janis Ian aside with her cascading silk Donna Karan gown and tassel earrings. Photo: 201... more Lizzy Caplan The actress officially put all memories of Janis Ian aside with her cascading silk Donna Karan gown and tassel earrings. Photo: 2015 Getty Images

Expand Photo Emma Roberts A slinky jade silk gown by Ralph Lauren complemented the actress's polished updo. Photo: 2015 Getty Images

Expand Photo Larry David The newly minted Broadway star looked "prett-ay, prett-ay, prett-ay good" in all black with a formal twist on his signature... more Larry David The newly minted Broadway star looked "prett-ay, prett-ay, prett-ay good" in all black with a formal twist on his signature sneakers. Photo: 2015 Getty Images

Expand Photo Jennifer Connelly The actress went for bold shoulders by Louis Vuitton. Photo: 2015 Getty Images

Expand Photo Constance Jablonski Photo: 2015 Getty Images

Expand Photo Helen Mirren Photo: 2015 Getty Images

Expand Photo Anna Wintour Known to favor a dramatic sleeve, Wintour kicked off the night in dramatic Chanel Couture. Photo: 2015 Getty Images

Expand Photo Brie Larson, Courtney Eaton, and Annabelle Wallis The crowned Dolce & Gabbana triumvirate touched on all the night's themes — gold, flower em... more Brie Larson, Courtney Eaton, and Annabelle Wallis The crowned Dolce & Gabbana triumvirate touched on all the night's themes — gold, flower embellishments, and intricate headwear. Photo: 2015 Getty Images

Expand Photo Kate Beckinsale The actress wore shoes by Christian Louboutin. Photo: 2015 Getty Images

Expand Photo Karen Elson The phrase "Yaaas, queen" was made for this look — Dolce & Gabbana gets the credit for her crowned glory. Photo: 2015 ... more Karen Elson The phrase "Yaaas, queen" was made for this look — Dolce & Gabbana gets the credit for her crowned glory. Photo: 2015 Getty Images

Expand Photo Gemma Ward The back-on-the-scene model made an entrance in sequined Michael Kors.

Expand Photo Karolina Kurkova The model chose a Tommy Hilfiger cocktail dress. Photo: 2015 Getty Images

Expand Photo Dree Hemingway The socialite went biker chic in a Stuart Vevers design for Coach.

Expand Photo Vanessa Hudgens Fresh from treading the Broadway boards as Gigi, Hudgens wore affordable and chic H&M. Photo: 2015 Kevin Mazur

Expand Photo Rosie Huntington-Whiteley If you're Donatella, you entrust your best body-con handiwork to the stunning supermodel, here in Atelier Versace and s... more Rosie Huntington-Whiteley If you're Donatella, you entrust your best body-con handiwork to the stunning supermodel, here in Atelier Versace and shoes by Christian Louboutin. Photo: 2015 Getty Images

Expand Photo Livia Giuggioli, Colin Firth Livia wore a red gown by Tom Ford. Photo: 2015 Getty Images

Expand Photo Behati Prinsloo The model chose a Tommy Hilfiger velvet gown.

Expand Photo Georgia May Jagger Alessandro Michele, newly installed at Gucci, has a red-carpet hit with Jagger's ornate look. Photo: 2015 Getty Images

Expand Photo Adrien Brody Adriene Brody went all out in Dolce & Gabbana.

Expand Photo Du Juan Du Juan wore jewels by Cindy Chao. Photo: 2015 Getty Images

Expand Photo Coco Brandolini Coco Brandolini wore Dolce & Gabbana. Photo: 2015 Getty Images

Expand Photo Dianna Agron Agron went simple in a Tory Burch one-shoulder gown with bird embroideries. Photo: 2015 Getty Images

Expand Photo Gao Yuanyuan Gao Yuanyuan wore an icy Michael Kors gown. Photo: 2015 Getty Images

Expand Photo Wendi Deng The co-host paired her body-conscious Oscar de la Renta with a flower pin in her hair by Cindy Chao. Photo: 2015 Getty Images

Expand Photo Grace Coddington Vogue's creative director told the Cut that she picked her pajama'ed look for maximum travel efficacy — she has a flight to catc... more Grace Coddington Vogue's creative director told the Cut that she picked her pajama'ed look for maximum travel efficacy — she has a flight to catch. Photo: 2015 Getty Images

Expand Photo Alexi Ashe, Seth Meyers Alexi wears a strapless gown by Carolina Herrera. Photo: 2015 Getty Images

Expand Photo Baz Luhrmann, Catherine Martin Photo: 2015 Getty Images

Expand Photo Mario Testino Photo: 2015 Getty Images

Expand Photo Hannah Davis Yet another lady in red, the Sports Illustrated cover girl wore cutout J. Mendel, shoes by Christian Louboutin and statement ea... more Hannah Davis Yet another lady in red, the Sports Illustrated cover girl wore cutout J. Mendel, shoes by Christian Louboutin and statement earrings by Marina B. Photo: 2015 Kevin Mazur

Expand Photo Tabitha Simmons Someone has to go for it — and the designer, in a Dolce & Gabbana look complete with gilded headdress, certainly did. Photo:... more Tabitha Simmons Someone has to go for it — and the designer, in a Dolce & Gabbana look complete with gilded headdress, certainly did. Photo: 2015 Getty Images

Expand Photo Candice Swanepoel The model wore a nude gown by Michael Kors. Photo: 2015 Getty Images

Expand Photo Elizabeth Banks She showcased her A+ abs in pool-blue Michael Kors.

Expand Photo Dylan Lauren Photo: 2015 Kevin Mazur

Expand Photo Caroline Trentini Photo: 2015 Getty Images

Expand Photo Donna Karan, Calvin Klein Photo: 2015 Getty Images

Expand Photo Bee Shaffer Wintour's daughter chose a cherry blossom Alexander McQueen motif for the red carpet. Photo: 2015 Kevin Mazur

Expand Photo Gong Li The co-host was stunning in a floor-sweeping velvet Roberto Cavalli gown with lace accents and jade earrings by Piaget— a subtle nod to t... more Gong Li The co-host was stunning in a floor-sweeping velvet Roberto Cavalli gown with lace accents and jade earrings by Piaget— a subtle nod to the theme. Photo: 2015 Getty Images

Expand Photo Michael B. Jordan The actor chose a tuxedo by Dolce & Gabbana. Photo: 2015 Getty Images

Expand Photo Tory Burch Burch opted for a whimsical, printed '50s-style gown of her own design. Photo: 2015 Getty Images

Expand Photo Common The rapper wore a tuxedo by Prada.

Expand Photo André Leon Talley Photo: 2015 Getty Images

Expand Photo Rachel Weisz The actress wore a Chanel tube dress. Photo: 2015 Getty Images

Expand Photo Stewart F. Lane, Luo Yan Photo: 2015 WireImage

Expand Photo Carina Lau The actress wore black and white Shciaparelli Haute Couture. Photo: 2015 Getty Images

Expand Photo Ansel Elgort Ansel Elgort in the official uniform of a teen star turned-dapper gentleman: a Tom Ford tuxedo. Photo: 2015 FilmMagic

Expand Photo Marissa Mayer Red was the unofficial color of the night, and Marissa Mayer went with an Oscar de la Renta design by Peter Copping. (She also wore... more Marissa Mayer Red was the unofficial color of the night, and Marissa Mayer went with an Oscar de la Renta design by Peter Copping. (She also wore Oscar to the morning's museum preview.) Photo: 2015 FilmMagic

Expand Photo Kenneth Cole Photo: 2015 Getty Images

Expand Photo John Boyega The actor wore a tuxedo by Burberry. Photo: 2015 FilmMagic

Expand Photo Poppy Delevingne Poppy Delevingne went literal with a Marchesa gown emblazoned with her namesake flowers. Photo: 2015 Getty Images

Expand Photo Ivanka Trump Ivanka Trump chose jewels by Cindy Chao. Photo: 2015 Getty Images

Expand Photo Irina Shayk The model wore a dress by Topshop. Photo: 2015 Getty Images

Expand Photo Alison Brie The actress wore shoes by Christian Louboutin. Photo: 2015 Getty Images

Expand Photo Katie Couric Photo: 2015 Getty Images

Expand Photo Sophie Turner The Game of Thrones star wore a dress by Burberry. Photo: 2015 Getty Images

Expand Photo Andy Cohen Andy Cohen wore jewels by Cindy Chao. Photo: 2015 Getty Images