Over the last 38 years it has been on PBS, Sesame Street has had plenty of celebrity guest stars. Here's a link for more information:

http://en.wikipedia.org/wiki/List_of_celebrity_guest_stars_on_Sesame_Street

Now, after looking at that list, what current celebrities would you like to see guest star on Sesame Street? Start chiming!

witch season did Tony Danza Guess Star on Sesame Street