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Singer Katy Perry cheers for Mississippi during a
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Singer Katy Perry cheers for Mississippi during a telecast of ESPN's College GamDay in The Grove at the University of Mississippi prior to their NCAA college football game against Alabama in Oxford, Miss., Saturday, Oct. 4, 2014.(Credit: AP / Rogelio V. Solis)

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Katy Perry through the years

Rainbow Brite's musical sister Katy Perry first made a mark as the popster behind 2008's "I Kissed a Girl." Currently, she's on her "Prismatic" tour.