"Mah Nà Mah Nà" is a popular song written by Piero Umiliani. It originally appeared in the Italian film Sweden: Heaven and Hell (Svezia, Inferno E Paradiso). It was a minor radio hit in the U.S. and in Britain, but became better known in English-speaking countries from its use in a recurring blackout sketch for the 1969-70 season of The Red Skelton Show, the 14th episode of Sesame Street, the first episode of The Muppet Show, and also from its consistent use as the primary silent comedy sketch scene music for The Benny Hill Show.
Aside from its notoriety from The Benny Hill Show, "Mahna Mahna" became familiar to many from its renditions by the Muppets on television. In 1969, the first season of Sesame Street featured a sketch featuring two Muppet girls voiced by Frank Oz and Loretta Long who are unsure of what to do, until they decide to sing a song, enter an unusual-looking short, shaggy-haired male Muppet character who begins singing "Mahna Mahna", prompting the girls to join him. None of the characters had names at the time, but the male Muppet who led the "Mahna Mahna" call-and-response was eventually given the name Bip Bippadotta, so as to differentiate him from the official Mahna Mahna character that would be developed later on. The Muppet character called Mahna Mahna was originally performed by Muppets creator Jim Henson, and is now currently performed by Muppeteer veteran Bill Barretta.
On 30 November 1969, "Mahna Mahna" was performed on the The Ed Sullivan Show by three new and more fully detailed Muppet characters. The male Muppet character was now purple with wild, orange hair and a furry, green tunic, while the female Muppet characters were two identical pink alien creatures with horns and cone-like mouths (with yellow lips) that always remained open. At this point the male Muppet was given the name Mahna Mahna and the female alien creatures were referred to as The Snowths (as a portmanteau of "snout" and "mouth" since their mouth also served as their noses), both performed by Muppeteer veteran Frank Oz. The song "Mahna Mahna" was played at a slower tempo and given a more playful, quintessential "children's"-style arrangement as opposed to the previous arrangement which was slightly reminiscent of the early 1960s Calypso.
In 1976, on the first episode of The Muppet Show to be recorded (featuring Juliet Prowse), the 1969 "Mahna Mahna" routine from The Ed Sullivan Show was reworked and used as the first sketch with the same characters and a new recording of the last musical arrangement. The Muppet Show became an immediate hit and "Mahna Mahna" was the highlight of that episode. During the sketch, Mahna Mahna managed to dance his way backstage and out of the Muppet Theater, phoning the Snowths after exiting. At the end of the episode, he managed to enter Waldorf and Statler's box.
As a result, the original Piero Umiliani recording finally became a hit in the UK (#8 in the UK charts in May 1977), where the Muppet Show soundtrack album featuring the Muppets' version went to number one. It was at that point that the name "Mahna Mahna and The Snouths" was given the incorrect credit of "Mahna Mahna and The Snowths," which has served as the definitive spelling ever since then.
Meanwhile, later on in that same episode, a snippet of the song "Lullaby of Birdland" is 'hummed' during one of the improvisational passages, as part of a running gag involving "Mahna Mahna".
The song is performed in the 2011 Muppets film, where various celebrities sing with the Snowths in the end credits.