Today Xbox 360 owners can try out two of Activision's upcoming rhythm games. Demos for DJ Hero 2 and Guitar Hero: Warriors of Rock are now on Xbox Live.

Each demo allows you to try out four tracks. Here's what you'll be able to mix or play in each game:

DJ Hero 2

• Pussycat Dolls Featuring Busta Rhymes "Don't Cha" Mixed With Pitbull "I Know You Want Me (Calle Ocho)"
• Lady Gaga Featuring Colby O'Donis "Just Dance" Mixed With Deadmau5 "Ghosts N Stuff"
• MSTRKRFT Featuring N.O.R.E. "Bounce" (Battle Mix)
• Estelle Featuring Kanye West "American Boy" Mixed With Chic "Good Times"

Guitar Hero: Warriors Of Rock

• Black Sabbath "Children of the Grave"
• Foo Fighters "No Way Back"
• Slash featuring Ian Astbury "Ghosts"
• Dethklok "Bloodlines"

Neither demo was included in the PlayStation Store update today. I imagine both will arrive on the PS3 before the games hit stores this fall, though.