2015 Billboard Music Awards Red Carpet: See What The Stars Are Wearing!

Zendaya, a presenter at the show, opted for a black-and-white printed pants suit—and the bandeau was a fashion-forward touch!

Charli XCX said on the red carpet that she was going for a more simple look than usual, rocking a black slip dress from the 1920's and a classic red lip.

Giuliana Rancic hosted E!'s red carpet pre-show in an LBD from Mugler and gorgeous jewels from Le Vian. That slit though!

Jennette McCurdy looked like a gorgeous mermaid on the red carpet. She co-hosted Samsung Galaxy's LIVE red carpet show that streamed on Yahoo.

Fall Out Boy, looking quite snazzy in black suits, will perform with Wiz Khalifa during the show.

Tori Kelly was white hot on the carpet, where she admitted that she was nervous for her performance. Tori also said she'd consider dueting with Justin Bieber—the two artists share a manager, Scooter Braun—if the timing and song was right.

Idina Menzel told Giuliana Rancic on the carpet that she was lovin' her newly blonde hair. However, Idina stayed tight-lipped about Frozen 2, saying that it was "too early" to reveal anything but that she's thrilled to reprise her role as Elsa.

Orange Is The New Black's Laverne Cox wore a silver and white Marc Bouwer design to the event. She's presenting an award.

Though they've essentially confirmed that they're back together, Casper Smart and Jennifer Lopez walked the carpet separately at the BBMAs.

Kylie Jenner highlighted her teeny waist in a black and gold striped dress. She's performing along with sister Khloe Kardashian during the show.

Kendall Jenner walked the carpet with Balmain Creative Director Olivier Rousteing and fellow model Jourdan Dunn. During an interview, the trio announced the new H&M/Balmain collaboration that they're working on!

Hailee Steinfeld was glowing on the #BBMAs carpet, probably from the fact that her film Pitch Perfect 2 was number one at the box office over the weekend!

Ed Sheeran came straight from his international tour for a stop in Vegas for the #BBMAs. He's nominated and performing at the show, so clearly the trip was worth it!

Jennifer Lopez wore yet another amazing, barely-there dress to the BBMAs that's comparable to her infamous Grammys dress! JLo will be taking up residency at Sin City's Planet Hollywood starting in January of 2016.

Meghan Trainor wore a sparkly green gown to match her eyes! She's performing a duet with John Legend, which she said she's nervous about because "I want him to like me!"

What a duo! The show's co-host Chrissy Teigen looked anything but nervous walking the red carpet with hubby John Legend, who is a performer and nominee.

Another hot couple was Nick Jonas and Olivia Culpo. After being introduced by The Bachelorette's Britt and Kaitlyn, Nick performed his hit, "Jealous." 

But no couple was cuter than these two! Chris Brown took his daughter Royalty as his plus one, and she looked quite at home on the carpet!

Fifth Harmony were perfectly coordinated and perfectly adorable at the event.

Rita Ora confessed that she went commando in her sexy cut-out dress. A dress that revealing leaves little room for undergarments!

Is that you, Onika? Nicki Minaj pulled a Lady Gaga in a bizarre yet show-stopping ensemble.

Britney Spears and Iggy Azalea looked like best buds on the carpet before performing their duet, "Pretty Girls," for the first time ever.

New Las Vegas resident Mariah Carey looked flawless on the carpet in a sexy black dress. She later performed her classic tune "Vision of Love" and her current single, "Infinity," to a standing ovation.