Some awesome puppetry (Muppetry?) with two Kermits singing Under Pressure.
And yes, the guy himself is not homeless. He's doing this to raise awareness, draw attention to, and help out the homeless. There's a CNN interview with him on the Youtube page for the video, as well as some comments from the creator and more: http://www.youtube.com/watch?v=QYXKaAzEJrk