The rap acts each earn their first Hot 100 No. 1 with the viral track. Plus, Bruno Mars' "24K Magic" is the week's top-selling song for the first time.

Migos' "Bad and Boujee," featuring Lil Uzi Vert, rises 2-1 to crown the Billboard Hot 100 (dated Jan. 21), driven in part by viral online buzz.

As we do every Monday, let's run down the top 10 of the Hot 100, which blends sales, airplay and streaming data. All charts will update on Billboard.com tomorrow, Jan. 10.

"Bad" is the first Hot 100 No. 1 for both hip-hop trio Migos (Quavo, Takeoff and Offset) and rapper Lil Uzi Vert (born Symere Woods). It's also the first Hot 100 leader for the 300 Entertainment label, founded in 2014, as well as the first topper for the Quality Control imprint. (In the Hot 100's 58-year history, the song is the 1,060th No. 1 all-time.)

As previously reported, "Bad" has inspired numerous memes and tweets playing off the song's "raindrop, drop top" lyrics. A 60-second clip of Migos of performing "Bad" in Lagos, Nigeria, posted to Twitter Dec. 20, has also helped the song's profile surge.

"Bad" tops the Streaming Songs chart for a second week with 35.3 million U.S. streams (up 9 percent) in the week ending Jan. 5, according to Nielsen Music. The majority of its streams stem from YouTube (19.3 million), followed by Spotify (9.2 million). The track also leads the audio subscription services-based On-Demand Streaming Songs chart for a second week (15.9 million on-demand clicks, up 7 percent).

"Bad" pushes 4-2 in Digital Song Sales (76,000 downloads sold, down 35 percent; most songs dropped significantly in sales in the tracking week, following a hearty prior sales frame that included Christmas-week shopping) and nears the Radio Songs chart, gaining by 34 percent to 20 million in airplay audience. On R&B/Hip-Hop Airplay, it bounds 14-6 as the chart's Greatest Gainer (up 31 percent to 16.2 million in audience at the format).

"Bad" additionally takes over atop Billboard's Hot R&B/Hip-Hop Songs and Hot Rap Songs charts.

Looking ahead to next week, "Bad" could further gain thanks to Donald Glover's shout-out of the song during his acceptance speech at the Golden Globes last night (Jan. 8). With Migos having guested on the FX series Atlanta, created by and starring Glover, he praised, "I really wanna thank the Migos, not for being in the show, but for making 'Bad and Boujee.' Like, that's the best song ever." (Any consumer reaction to the mention would count for next week's Hot 100, which will cover streaming and sales from Jan. 6 through Jan. 12.)

As the act hits the Hot 100's top spot, Migos has blasted past its previous best peak, No. 69, set by "Fight Night" in 2014. Meanwhile, Lil Uzi Vert's second-highest-charting Hot 100 entry brings him more good news: "You Was Right" rises 42-40, reaching the top 40 at last in its 26th week on the list.

(And, good news for a Hot 100 No. 1 with "bad" in its title: Migos' new leader is the first such song since Taylor Swift's "Bad Blood," featuring Kendrick Lamar, on June 6, 2015. It's also the first such topper by a group since 1988, when Bon Jovi reigned with "Bad Medicine." Bon Jovi, in fact, had scored the last two Hot 100 No. 1s with "bad" in their titles among groups prior to "Bad and Boujee": "You Give Love a Bad Name" ruled in 1986.)

"Bad" dethrones a song that likewise originally topped the Hot 100 fueled in part by viral action, Rae Sremmurd's "Black Beatles," featuring Gucci Mane, after seven nonconsecutive weeks at No. 1; "Beatles" had first led the Hot 100 dated Nov. 26, boosted by videos with the song's audio serving as the soundtrack to Mannequin Challenge clips. "Beatles" rises 3-2 on Streaming Songs (24.7 million, down 13 percent); drops to No. 4 after seven weeks atop Digital Song Sales (66,000, down 52 percent); and keeps at its No. 8 high on Radio Songs (97 million, up 8 percent).

Notably, hip-hop-based rap tracks lead the Hot 100 for the first time in back-to-back weeks for the first time in more than eight years (considering titles that have hit the top 40 of R&B/Hip-Hop Airplay): on Nov. 15, 2008, T.I.'s "Live Your Life," featuring Rihanna, replaced his own "Whatever You Like" at the Hot 100's summit.

The Chainsmokers' "Closer," featuring Halsey, rebounds 4-3 on the Hot 100 after spending 12 weeks at No. 1. Having totaled all 23 of its weeks on the chart in the top 10, dating to its debut at No. 9 on Aug. 20, the collab ties the mark for the most consecutive weeks tallied in the top 10 from a song's debut week. Justin Bieber's "Love Yourself" likewise logged its first 23 weeks on the Hot 100 in the top 10 (Dec. 5, 2015-May 7, 2016), including two at No. 1; the ballad went on to become the top title on the 2016 year-end Hot 100.

The Weeknd's "Starboy," featuring Daft Punk, descends 3-4 on the Hot 100 after crowning the Jan. 7 chart, becoming The Weeknd's third leader and Daft Punk's first. It leads the Hot R&B Songs chart for a 15th week. Meanwhile, follow-up "I Feel It Coming," also featuring Daft Punk, jumps 34-25 on the Hot 100 (nearing its No. 22 high set last month).

Rounding out the Hot 100's top five, Bruno Mars' "24K Magic" holds at No. 5 after peaking at No. 4, while becoming the best-selling song of the week for the first time. It lifts 7-1 on Digital Song Sales (77,000, down 27 percent). (The track received notable further attention after Mars appeared on CBS' The Late Late Show With James Corden Dec. 13, and sang it in the coveted passenger seat, in the show's "Carpool Karoake" segment.)

Ariana Grande's "Side to Side," featuring Nicki Minaj, reverses course on the Hot 100, lifting 7-6 after reaching No. 4. It leads the top 40-based Pop Songs airplay chart for a fifth week, tying Sia's "Cheap Thrills," featuring Sean Paul, in August-September and Swift's "Bad Blood" (five weeks, 2015) for the longest reign by a lead female since Swift's "Blank Space" topped Pop Songs for six weeks in 2014-15.

Maroon 5's "Don't Wanna Know," featuring Lamar, returns to the Hot 100's top 10, and its peak (11-7), while topping Radio Songs for a fourth week (142 million, up 9 percent).

DJ Snake's "Let Me Love You," featuring Bieber, stays at No. 8 on the Hot 100, after peaking at No. 4; Drake's "Fake Love" is likewise steady, at No. 9, its best rank; and Machine Gun Kelly and Camila Cabello's "Bad Things" rebounds 12-10, after hitting No. 9 two weeks earlier.

Among moves just beyond the Hot 100's top 10, Alessia Cara's "Scars to Your Beautiful" climbs 15-12, hitting a new highpoint; Zayn and Taylor Swift's "I Don't Wanna Live Forever (Fifty Shades Darker)" jumps 22-14, boosted by interest in the Jan. 2 arrival of the Fifty Shades Darker extended trailer, as the duet reaches its best rank since it debuted at No. 6 three weeks ago; and Big Sean's "Bounce Back" bumps 21-18, reaching the top 20 for the first time.

And, further looking ahead to next week, Ed Sheeran should make a splashy start on the Hot 100 with two songs: "Shape of You" and "Castle on the Hill." Both released Friday (Jan. 6), the tracks launched at Nos. 1 and 2, respectively, on the Billboard + Twitter Trending 140. Already, on the new Jan. 21-dated Radio Songs chart, "Shape" (the single being promoted to radio) debuts at No. 41 with 29 million audience in its first three days of airplay. Check Billboard.com this week for projections of where the songs could debut on next week's Hot 100 following their first full week of tracking.

Plus, find out more Hot 100 news in the weekly "Hot 100 Chart Moves" column later this week, and visit Billboard.com tomorrow (Jan. 10), when all charts, including the Hot 100 in its entirety, will refresh.