When I was younger, I used to think that there was a song with the lyrics "I'm blue, and indeed I have died, and indeed I have died, and indeed I have died", but then I got hold of the lyrics telling me they sang "da ba dee da ba die da ba dee da ba die". I wondered why people gave me funny looks when i was 10...
A childhood belief about misheard lyrics

others believed things like this
- When i was younger i thought R.I.P on graves was a persons name, i always wondered why so many Rips died. — Jess
- I thought there was some video games so hard that if you died on them you also died in real life!— Kakuri
- When I was little I believed when an actor died in a movie, he died in real life.— Ben
- I used to believe that when we died (and animals) died they were picked up in a bus with there name on it.— Lawny
- I used to believe everyone died when they turned 100, and they never died before or after.Anon
- When i was younger i believed that when you died your soul use to go into a monkeys body— Ríoghnach