tangledtale linked me to
this blog post, which includes a download link for 'Why When Love Is Gone', from Release Me. It's not an especially new post, but I'm going to assume I'm not the only one who had never heard this song?
It's gorgeous, and somehow even more retro than usual. (At one point in the chorus it hits a note that always makes me expect them to segue into 'Girls Just Wanna Have Fun', uh. Make of that what you will.)
ETA: Apparently actually a cover? And a b-side for the 'He's Not a Boy' single.