Nick Jonas Debuts ‘Check That Shape’ With Help of ‘Sesame Street’ Gang

Nick Jonas is bringing his signature swagger to Sesame Street. In a new episode airing on Saturday, May 21, as part of the show’s 46th season (its first on HBO), Nick lends his musical talent in a new original song called “Check That Shape."

With a little help from Bert, Cookie Monster, and The Count on back-up vocals, Nick teaches tiny fans about shapes like pentagons and octagons in this catchy tune. While the 23-year-old singer’s new educational vocals are likely to be a huge hit, he’s far from the only star to make a guest appearance on the long-running children’s show. Billy Crystal, the late Robin Williams, and Nicole Kidman are just a few of the famous faces we’ve seen on Sesame Street over the years.

Check out this video for a look at some of the most memorable celebrity cameos, and tune in to The Insider With Yahoo on TV tonight for the latest in entertainment news.