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TAMPA, FL - DECEMBER 22: Charli XCX performs onstage during 93.3 FLZ’s Jingle Ball 2014 at Amalie Arena on December 22, 2014 in Tampa, Florida. (Photo by Alexander Tamargo/Getty Images for iHeartMedia)

TAMPA, FL - DECEMBER 22:  Charli XCX performs onstage during 93.3 FLZ’s Jingle Ball 2014 at Amalie Arena on December 22, 2014 in Tampa, Florida.  (Photo by Alexander Tamargo/Getty Images for iHeartMedia)