The backup band on Steve Martin's "King Tut" single.
"His next album, A Wild and Crazy Guy...ended with a song "King Tut", sung and written by Martin and released as a 45 RPM single during the King Tut craze that accompanied the extremely popular traveling exhibit of the Egyptian king's tomb artifacts; the single reached #17 in 1978. The song was backed by the "Toot Uncommons" (they were actually members of the Nitty Gritty Dirt Band)."
https://en.wikipedia.org/wiki/Steve_Martin