I used to think that the really old song lyric "You're not the only one with mixed emotions" was "You're not the only one who lives in the ocean," until one day my mom was in the same room as me and it was on the radio. I started singing it and she laughed at me and corrected me...
A childhood belief about misheard lyrics

others believed things like this
- I used to think that the song "My Bonnie Lies Over the Ocean" was really "My Body Lies Over the Ocean."Anon
- I use to believe all the people singing on the radio were IN the radio.— Yvonne
- I used to think tiny little people were inside my mothers radio singing to me.Anon
- The song called heart of glass mixed me up as a kid. I heard "Heart and ass". — oops
- I used to believe that when a song came on the car radio, the band was sitting on top of our van.Anon
- I used to think that when a song finished on the radio it would play again on the next station— Maria