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Beyonce and Stewart, along with Avril Lavigne, Mary J. Blige, Alicia Keys, the Black Eyed Peas, Andre 3000, Usher and Hoobastank, performed Wednesday night at a special style-themed concert at Radio City Music Hall.
Held as part of New York Fashion Week, the event was sponsored by Conde Nast Media Group. It will air on Fox on Sept. 26.