Activision performed a live demo showcasing their upcoming DJ Hero game, one of the many new Guitar Hero games coming out this year. The songs they chose sounded like "Sabotage" by the Beastie Boys and "Learn to Fly" by the Foo Fighters. Pretty straight forward performance except they showed off the fact that Guitar Hero players would also be able to hop in and play along with the DJ in co-op. The demo was very impressive and the two went very well together. Here is footage straight from E3 2009.