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Colombia's star singer Shakira performs with FC Barcelona's Gerard Pique during "The Sun Comes Out World Tour" concert in Barcelona, Spain, Sunday night, May 29, 2011. (AP Photo/Emilio Morenatti)

Colombia's star singer Shakira performs with FC Barcelona's Gerard Pique during "The Sun Comes Out World Tour" concert in Barcelona, Spain, Sunday night, May 29, 2011.