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GLEE: Mercedes (Amber Riley, second from L) performs in the “What The World of Needs Now” episode of GLEE airing Friday, Feb. 6 (9:00-10:00 PM ET/PT) on FOX. Also pictured in background L-R: Naya RIvera, Heather Morris and Lea Michele. ©2014 Fox Broadcasting Co. CR: Mike Yarish/FOX