Katy Perry sported a strapless Vivienne Westwood dress and pink hair at today's American Music Awards in LA. She accessorised her colourful style with nude nails, blue heels, and a wild headpiece. The singer is up for multiple honours, including artist of the year, and will also be among the many performers during the show. She's taking the stage during a break from her California Dreams tour, which will wrap up with stops in Oakland and LA this week. Katy will then have a few months off to enjoy the holidays before she heads out on the European leg in February. Weigh in on Katy's look by voting on FabSugar and BellaSugar's polls.