21 Reasons Katy Perry is the Queen of Hair Transformations

Perhaps as just as popular for her hair color and fearless beauty looks as her music, Katy Perry has been wowing us with her "look at me" approach to hair and makeup since she first arrived on the pop music scene. Easily transitioning from a bright green tousled chop to a glossy black vintage wave, she never fails at providing us endless hair inspiration (and also inciting a tiny bit of color-induced jealousy). In honor of her birthday, we pulled together some of her best (and craziest!) hair moments.