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GLEE: Santana (Naya Rivera, second from L) and Sebastian (guest star Grant Gustin, third from L) perform with 2Cellos (Sulic, L and Hauser, R) in the "Michael" episode of GLEE airing Tuesday, Jan. 31 (8:00-9:00 PM ET/PT) on FOX. ©2012 Fox Broadcasting Co. CR: Adam Rose/FOX