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Amber Riley poses backstage at the Teen Choice Awards at the Gibson Amphitheater on Sunday, Aug. 11, 2013, in Los Angeles. Riley, best known for her role on the series "Glee" as Mercedes Jones, is one of the celebrities rumored to be on the dance floor on this season of "Dancing with the Stars." Watch the official announcement of the cast during "Good Morning America" on Wednesday. Season 17 of "Dancing with the Stars" kicks off on Monday, September 16.
((Photo by Jordan Strauss/Invision/AP))