Billboard Music Awards 2012: White carpet photos

Check out all the white carpet action from the 2012 Billboard Music Awards held at MGM Grand in Las Vegas on May 20.

The world's biggest stars were out in force, including Katy Perry, Usher, Justin Bieber, LMFAO, Amber Rose, Miley Cyrus and more!

Photos: Getty/ Getty Images Entertainment/ Frazer Harrison

Live stream: Backstage at the 2012 Billboard Music Awards

Billboard Music Awards winners list 2012