- The Electric Mayhem performs "Fugue for Frog" backstage. Unlike many other instances of musical performances taking place backstage, this is more of a song being auditioned as the new theme song (episode 123)
- Bernadette Peters and the Muppets sing "Just One Person" in the guest star's dressing room (episode 212)
- The entire show - including on-platform performances of "You're Lookin' at Country," "All Alone," "Oh, Lonesome Me," "The Rhyming Song," and "One's on the Way" - takes place at a railway station; additionally, Gonzo sings "Sentimental Journey" to Kermit while they travel by hand car to the station. (episode 308)
- Anne Murray and the Electric Mayhem perform "Walk Right Back" in the guest star's dressing room (episode 415)
- Debbie Harry, Kermit and the Frog Scouts sing "Rainbow Connection" in her dressing room (episode 509)
- Linda Ronstadt, Janice and the Female Singers sing "It's in His Kiss" in her dressing room (episode 523)
Numbers that begin backstage before being performed on-stage.