Celebrity cameos on 'Sesame Street'

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

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

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

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

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

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

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

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

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

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

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

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

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

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    Dave Matthews and Grover sing about feelings.

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    Ricky Gervais sings Elmo a celebrity lullaby.