Song

Hi!
I don't really remember where I heard this one, think it was in some store..
It's a woman singing, a little melancholic, and the only few words I remember are ''what happened to your smile, I haven't seen it for the longest while''.. something along the lines..
Thank!!!

I belive it's called "No Regrets" by Hardcore Superstar

What happened to, what happened to your smile
I haven't seen you, haven't seen you for a while