Hear Katy Perry Cover ‘Only Girl in the World,’ ‘Big Pimpin’,’ and ‘Whip My Hair’

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Perry's Teenage Dream tour kicked off over the weekend, complete with Rihanna shout-outs and a guy who wanders onstage to present Katy with a bedazzled recorder. "What have you been up to lately?" "Oh, I'm Katy Perry's jeweled-recorder keeper."

[ONTD]