Usher & Mary J Blige - It's A Man's World, Respect, & Do I Do (LIVE at 2007 Fashion Rocks)

Mary J. Blige and Usher perform during Conde Nast's Fashion Rocks concert at Radio City Music Hall in New York, Thursday, Sept. 6, 2007
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Usher is an amazing vocalist. His performance of the James Brown classic is top-tier.