I'm pretty sure it's just a mastered version of the demo for Shape of My Heart since she left the label and they released a greatest hits and needed a lead single to promote it.
Max Martin, Rami and Lisa wrote "Shape of My Heart", so she maybe wanted to release her own version of the song.
hey why does this song have BSB's lyrics AND TUNE in it?
Thought it reminded me of another song and it sure did, Backstreet Boys - Shape Of My Heart. Both versions are great anyway, go Lisa!
Someone has the HQ?