A friend of mine used to sing 'Oh my god! There's a snowman' instead of 'All we've got is this moment' to INXS's - Need You Tonight.
He was convinced that these were the correct lyrics and tried to justify this to me by saying 'Well, they come from Australia, so they've never seen snow before'.
A childhood belief about misheard lyrics

others believed things like this
- Brown or otherwise non-white snow was snowman poop. My kids believe it too!— Dellio
- My friend's sister believed the lyrics to Gazza's "Fog on the Tyne" were "Fog on the dinasaurs mine all mine"— Suzanne
- i was convinced that snow was pink, i was devastated the first i saw real snow.Anon
- I used to believe I could grow up to be a snowman.Anon
- When I was little, I thought he was called the "Abdominal Snowman" instead of "Abominable."Anon
- a friend was convinced that his school was an asylum, and couldn't be convinced otherwiseAnon