What will Ricky Martin be doing on Glee when he guest stars on the show later this season? Matthew Morrison tells Access Hollywood that Mr. Schue is sent to night school to brush up on his Spanish skills and is taught by the “La Vida Loca†singer himself, who then swings by McKinley High and is quickly embraced by the kids of New Directions. “So we have to have a kind of like Espanol-off,†teases Morrison. “He does a song, I do a song.†Morrison’s tune? A Spanish-language version of a yet-to-be-revealed Elvis Presley standard. Martin’s tune? “Sexy and I Know It,†by LMFAO. Not exactly a notable Spanish song, but if Martin is determined to prove his fidelity to LMFAO’s semi-NSFW music video, it’ll afford him the opportunity to shake much, much more than just his bon-bon.