Your going to think I'm kidding, but my mother (a musician and singer herself) heard me humming a tune one day when I was seven years old, and was surprised because she recognized it immediately. She asked me where I heard it and why I was humming it -- I told her I had heard it playing over the radio speakers in the grocery store the weekend before, while we were shopping, that I was humming it because it was the prettiest music I had ever heard, and I was sad because the radio hadn't said what it was called.
Without a word, she went to my father's record player, pulled out a record from the shelf I had never seen him play, found the groove she was looking for, and played it for me. I still have the record.
It was the "Ode to Joy." Thank you, Beethoven.