I used to believe (and still do) that the line in the oasis song "wonderwall" was your gonna be the one at sainsbury's instead of your gonna be the one that saves me!
A childhood belief about misheard lyrics

others believed things like this
- Oasis - Don't Look Back In Anger
"Oh, Harry can't mate
He knows it's too late
As he's stalking, oh my..."— Santa Puncher - I used to think that the song"Stayin Alive" said "Staying In Line" like at school when I was little. — MacKenzie
- I used to think that the line in the song "Life in the Fast Lane" was "Fights in the Bat Plane".Anon
- i thought the line "saving my face" from the KT Tunstall song of the same name was "shaving my face"Anon
- I thought the line in the song "more than a woman" was "four-legged woman".— boo
- I used to believe that a "punch line" meant a line of people waiting to dip punch from a punch bowl.— Sheila