Celebrities at the 2012 Billboard Music Awards (PHOTOS)

Music’s biggest stars stepped out in Vegas on May 20 for the 2012 Billboard Music Awards. From stunning (Carrie Underwood, Taylor Swift) to revealing (hello, Miley Cyrus’s boobs and legs!), the celebs dressed up and way down. Click through for a peek at the night’s fashion, and go here for a rundown of the event and its winners.

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