Big Bird and Elmo are trading in “Sesame Street” for “Lip Sync Battle”.

The iconic duo are trying their hands at lip syncing in a new preview for the hit competition series.

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In the sneak peek at the upcoming episode, Big Bird starts the gang off with a rendition of the Black Eyed Peas hit “I Gotta Feeling” before Cookie Monster shows up tearing it up on a cookie turnable while Elmo pops out of a cake.

The “Sesame Street” crew had a few famous fans in the audience, with co-host Chrissy Teigen, her husband John Legend and their daughter Luna absolutely ecstatic to see performance.

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“We love Big Bird,” Legend told co-host LL Cool J. “Luna’s so happy. Her favourites are all here.”

Big Bird, Elmo and Cookie Monster took on Jason Schwartzman in the new episode.