Ricky Gervais Sings Elmo a Lullaby 1.48K Whitney Jefferson 11/05/10 05:55PM Filed to: Sesame Street Sesame Street TV Elmo Ricky Gervais Video Okay, how many celebrity cameos does Sesame Street have per week? Not that we're complaining. Inside, Ricky Gervais sings little Elmo to sleep with an anthem about the letter N.