It's not my favorite track by a long shot, but I remember listening to what I think was a demo that she had on her Youtube page.
Actually I don't even know my favorite tracks! After like 2 albums listens even too. Of "new" songs, Night Glo, then Night Owls Early Birds, then Glorious is a 3-track punch right in the middle.
Yeah she shared the demo of The Unknown on her Youtube page in February 2013.