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| Music by | Richard Rodgers |
| Lyrics by | Oscar Hammerstein II |
| Date | 1951 |
| Source | The King and I (musical) |
| Publisher | Williamson Music Co. |
"I Whistle a Happy Tune", a song from The King and I about confronting one's fears, has been performed several times in a variety of Muppet productions.
Sesame Street
- performed by Grover and Cookie Monster on episodes 0131 (the second season premiere) and 0246.
- recorded by Bob for the album Bob Sings!
The Land of Gorch
- performed by Lily Tomlin and the Land of Gorch Muppets on the second season premiere of Saturday Night Live. Lily suggests they sing the song, only to discover that King Ploobis, Queen Peuta, Scred, Wisss, and the Mighty Favog can't whistle. The song peters out after the first verse, and Lily leaves the Muppets in their file cabinets, marking their last appearance on the show.
The Muppet Show
- performed by Julie Andrews, the Mutations, and several large monsters on episode 217.