I used to believe The Beatles sang "Hey Hey, were' the Monkey's".
A childhood belief about songs

others believed things like this
- Billy Squire sang about "My Kind of Lover". My wife sang about "My Candelabra"— Wailerman
- when i was a kid i used to believe the monkey could speak— killian
- i used to think that kiwis were monkey eggs— alyssa
- I used to think monk was short for monkey.Anon
- When I was little, I thought the Beatles really were bugs.— Spongekid
- When i was 5, i thought that bananas were monkey poop.— jade-isabelle