At the same time, I don't think we should be putting pop-stars on Sesame Street. The show is supposed to be about learning basic stuff, not about becoming a lemming to society and buying all the latest pop-star songs.
When I was a kid, the only "pop stars" I can remember that were on the show were C3P0 and R2D2, and that was only on one or two episodes.
Less corporate brainwashing, especially on PBS, please.