Hundreds of celebrities have appeared as themselves on Sesame Street, but plenty of popular fictional characters have made cameos as well. Here are some of our favorites, from R2-D2 to GOB Bluth (well, kind of).
1. C-3PO & R2-D2
Back in 1980, Big Bird saw a flying saucer touch down, but none of the adults believed him. Naturally, once their backs are turned, C-3PO and R2-D2 strolled on by. They'd come to Sesame Street to deliver a holographic message to Oscar from Lothar the Grouch. The important... READ ON