Female Artist with Piano, 2007ish...

I really hope someone can help me with this song, and a lousy vague description...

There is a song from approx 2007 - 2008, sung by a female vocalist with piano accompaniment. It is softish and slow, with low, slightly deep tones to it.

The only lyrics I think (and I'm really uncertain here) are "heaven knows" and "I don't know".

It sounds very Sara Bareilles, but I don't think it's her. It's definitely not Norah Jones. This song was played on mainstream radio stations in the St. Louis area in mid to late 2008. It seemed to come after Bareilles' hit "Love Song", which made me think it was her second single.

PLEASE HELP OMG GOING CRAZY.

Yael Naim - New Soul

Maybe?

No, though I do remember that song. It was slower, and the woman's voice, though very feminine, is deeper. Thanks tho