Girl, you don't know what you've done.
You don't know what you've done.
You don't know what you've done.
You don't know what you've done...

I can't believe it took so long
To realize we were so wrong
And now that you're gone
I know where, I know where I belong

Fifteen! What a long time to be with you
If I only knew the things you'd do...
GIRL YOU DON'T KNOW WHAT YOU'VE DONE!
And I'm glad we're done

I can't believe it took so long
To realize we were so wrong
And now that you're gone
I know where, I know where I belong

In case you haven't noticed, girl, I've moved on
And one day you'll see all that you lost in me
AND I DON'T REGRET A THING

I can't believe it took so long
To realize we were so wrong
And now that you're gone
I know where, I know where I belong