Song Stuck in Head

I keep getting this song stuck in my head lately, but when I start singing it, Diana has no idea what I'm singing. It is of course the Mahna Mahna song. It's hard to find online, because of copyright issues, so watch these clips fast before they get taken down or have their audio tracks disabled.

Here's the version I'm most familiar with, made famous on The Muppet Show. Although I believe this clip is from a performance on the Ed Sullivan Show (see the complete performance history.)



Before that, it was performed on Sesame Street with different Muppets:



As I learned from Mental Floss, the song itself was originally composed for an Italian documentary about sexuality in Sweden. Yes, you read that right.