All I remember is a woman, she's quite young and she was playing a piano (think it was red) But the piano is moving down the street with her sat on it.
I think that's right, I really want to find out what the song is. I'd really appreciate your help. Thanks!

Do you no some of the words in the song,.
Lyrics, or a line she may sing..
If you do I could most likely find it for you!

I found it! (I Googled "music video woman red piano street" with no quote marks -- piece of cake!)

YouTube - Vanessa Carlton - A Thousand Miles

Yay, Thank you so much! Xx