Biography
In episode 209 of The Muppet Show, Kermit says that he's gotten a lot of letters asking if he can tap dance. In response he sings and dances to "Happy Feet". Ironically, the audience never sees his feet during the number. Instead multiple Kermits are seen on the screen at the same time, but all from the waist up.
Biography text from Last.fm, available under CC BY-SA.