What do Robert DeNiro, Jason Mraz, First Lady Michelle Obama, David Beckham, Alicia Keys and Kofi Annan all have in common? They, along with hundreds of actors, politicians, athletes and rock stars have appeared on Sesame Street -- reciting the alphabet, dancing and singing with muppets and, in many cases, acting adorably silly.
"For celebrities, Sesame Street is a really fun and safe place to go. It's hip, cool and gives you cred." says Brian Jay Jones, author of Jim Henson: the Biography. "Famous people go on twitter and say things like: "Highlight of my career. I just appeared with Bert and Ernie."