Style Standouts at the Billboard Music AwardsCheck out what Miley Cyrus, Carrie Underwood, Katy Perry and more rocked on one of music's biggest nights

KATY PERRY

Purple sure is Katy's favorite color these days. The pop star stuns in a lovely open-back lavender sequined Blumarine gown, matching amethyst locks, Misaki bangles and on-trend dark lips.