'Glee': Ricky Martin Sings 'Sexy And I Know It' in 'The Spanish Teacher'

Ricky Martin is sexy and he knows it. The Latin heartthrob is guest-starring as a Spanish teacher in an upcoming episode of "Glee" in February, called "The Spanish Teacher," and Martin is covering another bon-bon shaking hit, LMFAO's hit single, "Sexy And I Know It."