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Barbadian singer Rihanna performs during the first stop of her 777 worldwide tour at the Plaza Condesa in Mexico City, Wednesday, Nov. 14, 2012. (AP Photo/Marco Ugarte)

Associated Press
Barbadian singer Rihanna performs during the first stop of her 777 worldwide tour at the Plaza Condesa in Mexico City, Wednesday, Nov. 14, 2012. (AP Photo/Marco Ugarte)
Barbadian singer Rihanna performs during the first stop of her 777 worldwide tour at the Plaza Condesa in Mexico City, Wednesday, Nov. 14, 2012. (AP Photo/Marco Ugarte)
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