Miss Piggy was performed both by Frank Oz and Richard Hunt in this episode. Oz performed all of the puppeteering and spoken dialogue during the "Temptation" scene, while Hunt pre-recorded her singing voice for the number, in what would be the only time he performed Miss Piggy's vocals in a musical number. Hunt also performed Piggy (and her dancing partner) in the "At the Dance" sketch.
The "Mah-na Mah-na" song had previously been performed by the Muppets on Yellow footprints (1969), Pat Henry, Irwin C. Watson, Sergio Franchi, Julie Budd, Neil Diamond, The Harlem Singers (1969), Pure Goldie (1971), This Is Tom Jones (1969) (July 8, 1971) and Jim Henson/Frank Oz/Jerry Nelson/Caroll Spinney (1971).
Gonzo Intro Muppet Show Sign Gag: exploding O
The following sketches all appear in "The Muppet Show Book", published by Harry N. Abrams, Inc in 1978: "Mah Na Mah Na", "Cowboy Time", "Gonzo the Great eats a tire" as well as the backstage plot involving "The Muppy Show". All of these sequences were entirely illustrated by Tudor Banus in the book.