The Drexel University Music & Entertainment Technology Laboratory (MET-lab) took a quartet of HUBO robots and made them into The Beatles. From the YouTube page:
The Drexel College of Engineering has seven of these robots, which cost between $300,000 and $400,000 each. Link -via Geekosystem
The HUBOs are operating autonomously (not human-controlled). Their movements are directed by student-developed software to perform the gestures necessary to produce the appropriate notes and beats as dictated by a musical score. Every sound in the video was performed by the robots.
The Drexel College of Engineering has seven of these robots, which cost between $300,000 and $400,000 each. Link -via Geekosystem