I could watch this video over and over:

Keepon is a Beatbot developed by Hideki Kozima and programmed by Marek Michalowski. To be clear, Keepon is a robot, not a puppet, as some have assumed. Check out the website to see his insides: Beat Bots dot org.

The song is Spoon’s I Turn My Camera On.

Human social behavior shares much in common with dance. Our speech, as well as the movement of our body, head, and hands, is periodic and rhythmic. The goal of the BeatBots project is to develop robots that can interact with people by synchronizing with these social rhythms. We believe that rhythmic synchrony is as important for establishing engagement, rapport, and comfort between a robot and a person as it is between people.