For "Wannabe" by the Spice Girls, I misheard
"I really really really wanna zigazigah!"
as
"I really really really wanna sing you this song!".
But my version makes A LOT more sense. So I still sing it like that. And people say "So THAT'S how it goes!".
A childhood belief about misheard lyrics

others believed things like this
- I used to sing at the top of my voice "OLD GIRLS JUST WANNA HAVE FUN"— claire
- my friends mom used to sing "you talk sense" instead of utah saints.— nikki
- Did anyone else sing "Hark, the hairy angels sing"?— Jill
- My mum said that when I used to sing "noahs arc" at school I would sing "who built the arc, no one, no one"— Clare
- I thought that singer/songwriter was spelled this way: sing-a-song-writer...Anon
- in the song "show me heaven" i used to sing "make me breakfast" instead of "leave me breathless"Anon