FILE - This May 7, 2012 file photo shows Beyonce Knowles at 

FILE - This May 7, 2012 file photo shows Beyonce Knowles at the Metropolitan Museum of Art Costume Institute gala benefit, celebrating Elsa Schiaparelli and Miuccia Prada in New York. Beyonce and Carole King are joining Oprah Winfrey and Alicia Keys at Keys’ annual Black Ball event for Keys’ charity Keep a Child Alive on Nov. 1, 2012 at New York’s Hammerstein Ballroom. (AP Photo/Evan Agostini, File)
Associated Press
FILE - This May 7, 2012 file photo shows Beyonce Knowles at the Metropolitan Museum of Art Costume Institute gala benefit, celebrating Elsa Schiaparelli and Miuccia Prada in New York. Beyonce and Carole King are joining Oprah Winfrey and Alicia Keys at Keys’ annual Black Ball event for Keys’ charity Keep a Child Alive on Nov. 1, 2012 at New York’s Hammerstein Ballroom. (AP Photo/Evan Agostini, File)
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