I used to think that the Australian National Anthem went:
"Australians all and Ostriches"
I also used to think that the pawns in chess were called "prawns".
A childhood belief about misheard lyrics

others believed things like this
- I thought tornados were monsters,and that they called out the national guard to destroy it.— Ben J.Grimm
- i used 2 think ostriches didnt have wings— venti
- i always wondered why people sent plums to the queen, in the anthem "send her victorias"— anon uk
- when was little i used to believe that if you won the grand national you would become prime ministerAnon
- I used to think my birthday was a national holiday and the whole world celebrated it— アノン
- I had a friend who thougt the Mount Rushmore national monument was a natural rock formation.Anon