I used to think the lyrics in Madonna's 'Material Girl' was 'Cos everybody's livin in a material world, and i am mom material girl' I just thought it meant she was the leader or 'mother' in this material world of hers :D
A childhood belief about misheard lyrics

others believed things like this
- When I was younger, I saw Madonna's video for "Material Girl". I thought she was singing "I'm a Cheerio Girl"!— Greg
- I always thought instead of saying "Im a material girl" Madonna was saying "Im a cheerio girl".— Tiffany
- That Madonna sang "I'm a cheerio girl" instead of material girl— HN
- I used to think satin was a material like velvet.Anon
- As a little girl I used to think that the world was magical.Anon
- I used to think I was the prettiest girl in the world and I felt really guilty for it.— Princesa