Song goes like "undercover / back to life"

So, this song plays at Kohls, and I can't find it. Anywhere.
It's not Back to Life by Hillsong Young & Free (matter of fact, I haven't even heard that song play at my Kohls..)
But it sounds like Sia. Her voice is so strong, and melodic, and it's almost brooding .. but she sings the vocals "undercover" and at one point repeats "back to life" about 3-4 times.
Anything? Anyone?
Thank you.

Is this the song you heard?
Sia co-wrote this song and did a demo version of it. Celine Dion then recorded and released her version of this song on one of her albums.

"Loved Me Back To Life (demo version)" by Sia Furler
http://www.youtube.com/watch?v=t2VZTvk8VF8

celine dion - loved me back to life
http://www.youtube.com/watch?v=4f5KuRXtjeE