The big diva vocals, the subtle shifts in harmonies, the on-trend horn-laden production...not to mention the replay-worthy video: "Holler," the just-released single from Girls' Generation-TTS, is making a play to be one of fall's most addictive K-pop tracks.

But what tunes has one of the act's singers been addicted to lately? In the latest installment of Billboard's "Gimme Five" series, we get an exclusive look at the top pop tunes today according to Tiffany, a member of both Girls' Generation and the TTS splinter trio.

The 25-year-old stunner proves to have her finger on the pulse when it comes to big hits -- four of the five of her picks have charted in the top 15 of the Billboard Hot 100. But could she also have an ear for future singles? The Los Angeles native also loves a currently cut from Ariana Grande's new album that has yet to get the single treatment.

Listen along to Tiffany's personal pop playlist below and don't miss her full Billboard interview with the Girls' Generation-TTS band mates where the trio talks about their new EP, reality show and how they're showing "a much more raw side" of their music.

1. Iggy Azalea featuring Rita Ora, "Black Widow"

TIFFANY: "I am obsessed with 'Black Widow.' I think it's awesome how the era of female artists is coming back. I grew up with that. To be able to watch that, be influenced and look forward to doing that...girl power! I'm all for that."

2. OneRepublic, "Love Runs Out"

"I love it. I wish sung this one. It seems sort of like Adele."

3. Ed Sheeran, "Sing"

"The guitar is great and he sings so well live. It sounds like live music and I like that."

4. Ariana Grande featuring Childish Gambino, "Break Your Heart Right Back"

"I love Ariana Grande's new album, obviously."

5. Sam Smith, "Stay With Me"

"I love how there's nothing special in terms of effects, but that his voice in of itself is so special and it draws the audience in. It's so deep. He brings me to tears!"

Check back to Billboard.com's K-Town column for more goodies from TTS all this week.

More Gimme Fives: IU | Miley Cyrus | Austin Mahone | Ariana Grande | SPICA | A Great Big World | Lucy Hale | Emblem3 | Little Mix | NKOTB | Icona Pop | Olly Murs | Carly Rae Jepsen | Charli XCX | Jessica Sanchez | Hot Chelle Rae | Colette Carr | Frankmusik | JoJo | How To Dress Well | Megan Hilty | Matthew Morrison | Foxes | Megan & Liz | Bonnie McKee | St. Lucia | Paris Hilton| Leona Lewis | AJR | Cassadee Pope | MKTO | Betty Who | Passenger