"Mah Nà Mah Nà" is a well-known pop music song, written by Piero Umiliani. It was a hit in many countries in 1968-1969. In the U.S. It peaked at #55 in the Billboard Hot 100 singles chart and #44 on the Cash Box magazine chart in October 1969. The song's lyrics contain no actual words, only nonsense words resembling scat singing. The original version interpolates melodies from "Swedish Rhapsody" ("Midsommarvaka" ["Midsummer Vigil"]) by Hugo Alfvén, "Santa Lucia", "Boogie Woogie Bugle Boy", the jazz standard "Lullaby of Birdland", and others.

"Mah Nà Mah Nà" debuted as part of Umiliani's soundtrack for the Italian softcore pornography movie Svezia, inferno e paradiso (Sweden, Heaven and Hell) (1968), a pseudo-documentary film about wild sexual activity and other behavior in Sweden ("Mah Nà Mah Nà" accompanied a scene set in a sauna). A soundtrack album, "Svezia, Inferno e Paradiso" was released in 1968. The movie was also released under the English title Sweden Heaven and Hell.

In 1969, Henri Salvador recorded a variation titled "Mais Non, Mais Non" ("But No, But No" or "Of Course Not, Of Course Not"), with lyrics he had written in French to Umiliani's tune.

The song became familiar to many from its renditions by the Muppets on national television. On November 30, 1969, "Mahna Mahna" was performed on the The Ed Sullivan Show by a Muppet also known as Mahna Mahna, and the Snowths. Also in 1969, "Mahna Mahna" was performed on Sesame Street by a character that was later known as Bip Bipadotta, along with two Anything Muppet girls.

During its 1969-70 season, "The Red Skelton Show" used the Umiliani recording as background music for a recurring blackout sketch. The otherwise silent bits featured Red and another performer, dressed as Moon creatures, playing with equipment left behind by the Project Apollo astronauts.

In 1973, a rendition of "Mah Nà Mah Nà" on the Moog synthesizer was released on the album More Hot Butter (Musicor MS 3254) by Hot Butter, best known for the pop tune "Popcorn". It was re-released on CD in 2000.

In 1976, the first episode of The Muppet Show to be recorded (featuring Juliet Prowse), used "Mahna Mahna" as the first sketch. It was performed by the Muppets "Mahna Mahna and the Snowths". As a result, the original Piero Umiliani recording finally became a hit in the UK, where the Muppet Show soundtrack album featuring the Muppets' version went to number one. http://www.everyhit.com/numberalb3.html