Texas born Zoe Jack has been singing since she was 2, but she's only just breaking out to a wider audience. A lot of her music and performing has been in the Gospel field. But "Let It Be For Christmas" is indicative of what she's doing now, which is a combination of Gospel and Jazz. And I sure want to add my voice in saying I really hope she continues down that path. She was born for just this kind of music (well, that's my opinion, for whatever its worth).
You could say that "Let It Be For Christmas" is Smooth Jazz. But it is so much more Jazz than your usual Smooth Jazz fare. Listen to how Zoe uses her voice towards the end of the song. Ladies and gentlemen, THAT is a Jazz singer. And you can tell she's using her voice that way because it feels right, not because "that's how we did it in rehearsal". By the way, I believe that's Kirk Whalum on the sax. The pair will be performing A Gospel According to Jazz in Texas over the next few nights (at least). I wish I could be there. You'll find performance dates and other news at Zoe's website and Facebook page.
Zoe Jack's "Let It Be For Christmas" is available for free download via ReverbNation. So you've got no excuse for not getting it. And, if you'd prefer to buy it, I'm sure that would make Zoe very happy. You'll find it pretty much everywhere, so it shouldn't disrupt your usual music shopping routine.