Celebrity cameos on 'Sesame Street'

Check who's partied with Big Bird and Elmo on 'Sesame Street!'

  • Charlize Theron talks about the word "jealous" with Abby Cadabby.

  • "Star Trek" actor John Cho talks about with Abby Cadabby about the word "sturdy."

  • "Man of Steel" star Henry Cavil talks to Elmo about "respect."

  • "Game of Thrones" actress Lena Headey and Murray learn about the word "relax."

  • "The Big Bang Theory" actor Kunal Nayyar and Grover talk about the word "robot."

  • "Game of Thrones" actor Peter Dinklage and the cast of "Sesame Street" sing about Simon Says.

  • Pittsburgh Steeler's Troy Polamalu and Elmo talk about the word "frangrance."

  • Bruno Mars sings "Don't Give Up" with the cast of "Sesame Street."

  • Will.i.am sings "What I Am" with the cast of "Sesame Street."

  • Jason Mraz sings with the cast of "Sesame Street."

  • Feist sings "1, 2, 3, 4" with the cast of "Sesame Street."

  • Adam Sandler sings "A Song About Elmo" with Elmo.

  • Dave Matthews and Grover sing about feelings.

  • Ricky Gervais sings Elmo a celebrity lullaby.