The Oompa-Loompas give their opinion about this matter

The melody came of course from "Willy Wonka & the Chocolate Factory", the musical film made in 1971.

The verse between the original catchphrases were written by Jeroen P. Broks, who is also the performer of this version...

Yes that happens to be me, and I know I'm a poor singer, so I don't need you to tell me that. Just enjoy this joke, will ya! And if you think it's not funny, well, nobody cares. 😝