Foo Fighters frontman Dave Grohl teams up with his new friends Big Bird and Elmo in a new clip from Sesame Street to sing the "Here We Go Song" while traveling the U.S. to meet friends. Saying that he's happy to be hanging out with his two new friends, Grohl tells Big Bird and Elmo that there are friends all over America "we just haven't met yet" before the trio sing while traveling the country. What are some big names that you remember seeing on Sesame Street as a kid? What is it that makes Dave Grohl so likable?