My babysitter told me that my Mom was once a famous singer named "Crystal". He also said her career was really taking off until I came along and ruined her voice by being born.
I lived with that guilt for years. The same guy convinced me that I was Jewish. This went on for years.
A childhood belief about pop stars

others believed things like this
- I used to believe (when I was 8) that Hitler was description for famous singer, because of "hit"— esesman
- Since Germans speak German, I thought Jewish people spoke Jewish.— Lori
- I grew up Jewish. Until I was about 10, I believed that everyone who wasn't Jewish was Catholic.— Philm35
- When i was 6 years old i had a dog named Sandy. And i thought she was made of Sand.— Billy Bob Joe
- I used to believe that people born on leap year would only age once every 4 yearsAnon
- I had my wife convinced that Steven Hawking made his fortune as the original voice for the speak N spell toy.Anon