PHOTOS: 2015 Billboard Music Awards winners

<div class="meta image-caption"><div class="origin-logo origin-image ap"><span>AP</span></div><span class="caption-text">Taylor Swift accepts the award for top artist at the Billboard Music Awards at the MGM Grand Garden Arena on Sunday, May 17, 2015, in Las Vegas. (AP)</span></div>
Who's taking home the top prize at the 2015 Billboard Music Awards? Check out all the winners!