Once in a Lifetime

From Muppet Wiki

"Once in a Lifetime" is a Talking Heads song performed by Kermit the Frog in episode 109 of Muppets Tonight.

Kermit did the number to fill in for Giganticus, who was unable to make it for the show. The suit worn by Kermit in the number was made for Giganticus, which parodies the suit Talking Heads band member, David Byrne, wore on stage and in music videos.