Stars showed up in pretty summer-ready colors at the 2012 Billboard Music Awards last night, held at the MGM Grand Garden Arena is Las Vegas. Katy Perry matched her iridescent lilac Blumarine design to her plum highlights, Taylor Swift took home the event’s Woman of the Year award in a strawberry red lace Elie Saab gown, Carrie Underwood turned up the volume in a frothy slate blue and rose tulle Oscar de la Renta creation, and Miley Cyrus took the plunge in double-breasted Jean Paul Gaultier tuxedo mini dress. See what everyone else wore to the awards show by clicking through the gallery! Then, tell us: Who do you think looked best?