Yay, Katy Perry: Part of Me 3D is finally in theaters! One of our fave things about KP — there are zillions – is her wacky outfit choices, both on stage an off. (Who else could pull off a cupcake bra? Come on!) But while Katy may have perfected the art of candy clothes, she’s not the only pop princess who hits the stage in totally out-there outfits. Take this quiz to find out which star’s crazy style you should copy!