Beside featuring big and colorful characters, children's shows rely on a catchy songs to draw in viewers. So naturally, there's a lot of work that goes into selecting a tune. While some write their own original music, others often borrow from other sources.
In 1976, when Jim Henson and his Muppets landed their own television shows after years of appearing on shows like Sesame Street, the show runners opted to use a song that was relatively popular in the late 60s for their opening sketch - "Mahna Mahna."
According to the popular version of the song's origin story, it was first heard during one of the sketches on the first season of Sesame Street in 1969. The Muppets performed the tune on The Ed Sullivan Show, as well as on other variety shows before reprising it for the debut episode of The Muppet Show.