When I heard David Bowie's "Suffragette City" as a teen I thought it was "Surfer Kid City." I wrote that on a tape I made, which I lent to my sister. Years later when we were in our twenties I told her what the real name was and she was irate, saying, "You just ruined that song for me forever."
A childhood belief about misheard lyrics

others believed things like this
- I thought that since my grandpa and my dad's names are both David, than David Bowie must be my aunt's son.Anon
- I thought that the song "Built this City" by starship went as follows. "Milk and Cereal, Rock and Roll"Anon
- I used to believe that the "real" Santa Claus was at Macy's in New York City. All the rest were fakes. — Marcia
- David Bowie - Jean Genie
"The Jean Genie lives on his back
The Jean Genie loves cheesy snacks"— Santa Puncher - i thought that if water towers fell the city would flood. So everynight i would stay up worrying.— o.O haku
- When I was young I thought the IRA was like the IRS and that Ireland was overrun by irate tax collectors.— jhager