I thought the lyrics to "Camptown racer" were:
"Countdown ladies sing this song! Tuna! Tuna!"
Later, I figured out that they weren't saying Tuna, but even after that, I thought it was "Countdown ladies"
A childhood belief about misheard lyrics

others believed things like this
- I believed until I was 18 that if I got tuna in the mayonaise jar, I would die the next time I ate it. — Sue
- I used to believe that our insides were made completely out of tuna— molly n
- I used to think that instead of bones and blood and tissue that you body was made up of tuna.— m.n
- When I was 4, I thought Bumblebee tuna was made from bumblebee meat.— Teresa
- For years and years I believed that tuna must be really little fish because they came in such small cans!!— Gisela
- I thought the lyrics to "Single Ladies" were "If you liked it, then you should've put your name on it."Anon