Miley Cyrus hit the white carpet at the 2012 Billboard Music Awards in Las Vegas this evening. Miley wore a sexy white Jean Paul Gaultier blazer with gold jewelry for the event at the MGM Grand Hotel. Miley's been keeping her look a little more casual lately and has been busy with her Winsor Pilates routine and her new puppy, Happy. Tonight's show is hosted by Modern Family's Julie Bowen and will feature performances by Justin Bieber, Katy Perry, Carrie Underwood, and more. Stay tuned for more coverage from the event!