Folks, at this point, we all be popping our dentures out each night and bitching about arthritis by the time Leona Lewis‘ forever-delayed Glassheart album ever sees the light of day. So in the meantime, we’ll just marvel at how prolific Sia — the best thing to ever happen to Flo Rida and, arguably, David Guetta — is these days. A short clip of a demo for “Blank Page”, a tune Sia apparently wrote for Leona’s upcoming album, has made its way online. And if it’s a gut-punch-packing ballad without the usual sop that you’re looking for, then you’ve found it. Hear the snippet below.