A few years ago I used to think that the Backstreet Boys song went "God needs to spend a little more time on you" instead of "God must have spent a little more time on you" and that it was a song about a dude breaking up with someone.
A childhood belief about misheard lyrics

others believed things like this
- I used to believe the Beastie Boys were a boy band. Well, the name sounds similar to Backstreet Boys!Anon
- Backstreet Boys - I want it that way? I heard "I was born on a tidal wave— gembop
- I used to think the song "dude looks like a lady" by aerosmith was "doodles like a lady"— I used to believe
- I used to believe the song "Dude Looks Like A Lady" said "Do It Like A Lady"— jvf
- I used to think that we were breaking a law every time my mom passed a "Do Not Pass" sign on the road. — Kyra
- I thought the song "Party Time" by Moby was actually saying "heart attack" (this was before I knew the title)— Elviessa