My younger brother used to think that song by the blue man group, instead of "I'm blue, babadi abadi..." went, "Oh, I'm a bee. I'm a guy. "I'm a bee. I'm a guy." etc. It was hilarious he never could figure out why we would laugh like maniacs when he sang along.
A childhood belief about misheard lyrics

others believed things like this
- You know the eifel65 song "Im blue da be da ba di"
I thought he said "I'm blue I'm in need of a guy"— Anna - The song "Reverend Blue Jeans" turned out to be "Forever in Blue Jeans." Who would have believed that?— music lover
- Eifel 65 - Blue
I'm Blue (if I was green I would die...)
[I'm blue, da ba dee, da ba di.]— Matt - I used to believe that TV finished after Blue Peter.— Jen
- I used to believe the sky was green and everybody was colorblind since they said it was blue— IM COW
- I used to think that blood was blue until it touched air.— paetrw