What is this app?

It’s something to do with iTunes. It shows album art on your desktop inside of a little cd case. Also this is either the same thing or something else: it’s the album artwork except it’s in your dock. Both looked like it was the current song playing in iTunes, not just random album art on your desktop. On Mactips.org there was a post called “What’s On Your Desktop?” and two people had it. The screenshots are gone from the site now, otherwise I would just upload a pic and not have to explain what it looks like.