Elmo might not be a fan of Rocko, but he does know how to rock. In an exclusive clip, the beloved red Sesame Street monster, his dog Tango, and pal Gabrielle join Betsy Wolfe and Lorna Courtney of ...

"Sesame Street" has had plenty of surprising guest stars over the years, from Katy Perry doing a duet with Elmo to Tina Fey playing a book-loving pirate to Joe Pesci showing up as land developer ...