The song "The Girl is on to you" by Bette Midler has a line
"She's grown much wiser than you realize," which I heard as "She's grown much wider than you realize."
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that grown-ups were born "grown up" and that I would stay a little kid forever.— Still A Kid
- I thought grown ups were born grown ups.— mea
- I used to believe that grown-ups were born grown up.— Juleen
- I used to think the song Bette Davis Eyes was called 'she's got better days besides'.— JJ Simpson
- When i was child, i used to believe i can fly, but i had to find the "formula" for realize it— Magic. W.
- The Kim Carnes song called 'Bette Davis Eyes' well my dad used to sing "She's got Dickie Davis Eyes" Anon