Six years on from "I Kissed a Girl," Katy Perry is still here, and then some. Far from the novelty starlet many initially pegged her as, she's evolved into the signature cotton-candy-fied pop princess of our time, a Dr. Luke–abetted megahit factory unto herself. Turn up for these big gigs, and hear Perry roar in support of last year's blockbuster Prism.
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