Katy Perry

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 to be, 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 her big gig at The Staples (with an extra date added to accomodate her copious Katy Cats) to hear Perry unleash her post–John Mayer–breakup roar in support of last year's blockbuster Prism. Everyone's favorite Canadian indie twins Tegan & Sara open.