1 of 12

Taylor Swift (C) introduces a performance by Van Halen with Zendaya (L), model Martha Hunt, (2nd L) model Lily Aldridge, actress Haille Steinfeld and actress Ellen Pompeo during the 2015 Billboard Music Awards
Credit: Reuters
2 of 12

Hosts Chrissy Teigan and Ludacris do a drinking game during the 2015 Billboard Music Awards
Credit: Reuters
Advertisement1
3 of 12

Singer Meghan Trainor poses backstage with her awards for Top Digital Song
Credit: Reuters
4 of 12

Singer Taylor Swift poses backstage with her awards for Top Artist, Billboard Chart Achievement Award
Credit: Reuters
5 of 12

Musician Calvin Harris poses backstage with his award for Top Dance/Electronic Artist during the 2015 Billboard Music Awards
Credit: Reuters
6 of 12

Musician John Legend poses backstage with his awards for Top Streaming Song (Audio) and Top Radio Song for All of Me during the 2015 Billboard Music Awards
Credit: Reuters
7 of 12

Singer Chris Brown performs Fun on stage at the 2015 Billboard Music Awards
Credit: Reuters
8 of 12

Tracie Ellis Ross (L) and Laverne Cox announce the award for Top Billboard 200 Album won by Taylor Swift at the 2015 Billboard Music Awards
Credit: Reuters
9 of 12

Wiz Khalifa performs See You Again as a tribute to actor Paul Walker at the 2015 Billboard Music Awards
Credit: Reuters
10 of 12

Mariah Carey performs a medley of songs at the 2015 Billboard Music Awards in Las Vegas
Credit: Reuters
11 of 12

Jennifer Lopez takes the stage at the 2015 Billboard Music Awards
Credit: Reuters
12 of 12

Tori Kelly performs Nobody Love at the 2015 Billboard Music Awards
Credit: Reuters