When I was 9 or 10 I heard Nena's "99 Red Balloons (or Luft Balloons)" for the first time. I thought on one part it said "99 decision trees" instead of "99 decision street." I also had a lot of other beliefs about the lyrics in this song. When she said, "You and I in a little toy shop" I thought she said "You and I and a little toshou" thinking that toshou was some foreign word for child or dog. My last one is when it says "panic bells, it's red alert" I thought she said, "panic birds, it's red alert." Until I looked the lyrics up, I had always wondered what a decision tree was, what language "toshou" was, and what birds had to do with the 3rd world war. :)
A childhood belief about misheard lyrics

others believed things like this
- My brother thought that one adult was a dult and that one alert was a lert.Anon
- When I was a kid, I thought the stars in the sky at night, were the balloons people let go.— Lisa
- My das convinced me that the birds which sat on our trees wanted to steal them. — belle
- Trees grew leaves as camouflage so birds would`nd nest in them. Don`t ask.— DaWind
- My mum always thought the lyrics to macy grays song was i try to say goodbye to my chook.— alana
- I would speak in gidderish, convinced that it was some foreign language I had never heard of— Molly