Not only did I not know that Smooth Criminal was a Michael Jackson song, I also thought that the cover Alient Ant Farm did of it was actually Weezer.
Of course I also thought the lyrics were, "Andy did you turn gay?" Gave a whole new meaning to who the Smooth Criminal was. Anyway, I really missed it somewhere in there...
A childhood belief about misheard lyrics

others believed things like this
- I used to think that in the song "Smooth Operator" they were saying "Schooooooool's not forever!"— Steph
- Until I was about 11 or 12 I thought that "prostitute" referred to a female criminal.Anon
- I really, truly thought that Michael Jackson and Janet Jackson were the same person. Anon
- i thaught the michael jackson song billy jean song said Janet's not my son Anon
- When I was a kid I was completely convinced that Sade's "Smooth operator" was "Ooh of the red eye".— Brookstar78
- I believed you ran the vacuum to cut the carpet and used the lawn mower to smooth out the grass.— Michelle