Taylor Swift poses backstage with her awardsduring the 2015 Billboard Music Awards in Las Vegas, Nevada May 17, 2015. Photo: Reuters
Brian Kelley and Tyler Hubbard of Florida Georgia Line pose backstage with their award for Top Country Artist during the 2015 Billboard Music Awards in Las Vegas, Nevada May 17, 2015. Photo: Reuters
Tayor Swift accepts the award for top artist at the 2015 Billboard Music Awards in Las Vegas, Nevada May 17, 2015. Photo: Reuters
Musician Calvin Harris poses backstage with his award for Top Dance/Electronic Artist during the 2015 Billboard Music Awards in Las Vegas, Nevada May 17, 2015. Photo: Reuters
One Direction accepts the award for top touring artist at the 2015 Billboard Music Awards in Las Vegas, Nevada May 17, 2015. Photo: Reuters
Celine Dion takes the stage to present the award for top male artist at the 2015 Billboard Music Awards in Las Vegas, Nevada May 17, 2015. Photo: Reuters
Zendaya attends the 2015 Billboard Music Awards, May 17, 2015, at the MGM Grand Garden Arena in Las Vegas, Nevada. Photo: AFPR
David Lee Roth attends the 2015 Billboard Music Awards, May 17, 2015, at the MGM Grand Garden Arena in Las Vegas, Nevada. Photo: AFPR
David Lee Roth attends the 2015 Billboard Music Awards, May 17, 2015, at the MGM Grand Garden Arena in Las Vegas, Nevada. Photo: AFPR
Ed Sheeran attends the 2015 Billboard Music Awards, May 17, 2015, at the MGM Grand Garden Arena in Las Vegas, Nevada. Photo: AFPR
Kendall Jenner attends the 2015 Billboard Music Awards, May 17, 2015, at the MGM Grand Garden Arena in Las Vegas, Nevada. Photo: AFPR
Kylie Jenner attends the 2015 Billboard Music Awards, May 17, 2015, at the MGM Grand Garden Arena in Las Vegas, Nevada.Photo: AFPR
Wiz Khalifa attends the 2015 Billboard Music Awards, May 17, 2015, at the MGM Grand Garden Arena in Las Vegas, Nevada. Photo: AFPR