This is a great sone written by Jonathan Coulton. For the past year, Jonathan Coulton has released a song every week through his fabulous Thing A Week podcast. He makes his songs available via the Creative Commons license, which enables projects such as this video.
Just Watch the vids below to see what I mean and to get the song for yourself goto jonathancoulton.com
Recorded live at Temple Bar Santa Monica CA
October 9 2006