Just about a year ago(im 14) i realized the song by TLC called Waterfalls said "Dont go chasing waterfalls", while I always thought it said "Go go Jason Waterfalls"
Also I thought the song "Yellow Taxi" by Counting Crows said "They paved paradise, to put up a fucking lodge" while it really says "They paved paradise, to put up a parking lot"
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that speed bumps were dead bodies that had been paved over.— Natalie
- i thought I got one year older when my family sang the birthday song.— I am the ghost
- When I first heard Bruce Springsteen's song, "Born in the USA," I thought that the song was "Porn in the USA"Anon
- i thaught the michael jackson song billy jean song said Janet's not my son Anon
- I use to think that Bruce Springsteen's song "growing up" was called "throwing up"— glowworm
- I used to think the song Bette Davis Eyes was called 'she's got better days besides'.— JJ Simpson