Soundtrack...

[Shaaady Souljah]

Nas (http://en.wikipedia.org/wiki/Nas) - "Hip Hop is Dead (http://en.wikipedia.org/wiki/Hip_Hop_is_Dead)"
T.I. (http://en.wikipedia.org/wiki/T.I.) - "What You Know (http://en.wikipedia.org/wiki/What_You_Know)"
T.I. (http://en.wikipedia.org/wiki/T.I.) - "Top Back (http://en.wikipedia.org/wiki/Top_Back)"
Fat Joe (http://en.wikipedia.org/wiki/Fat_Joe) - "Make It Rain"
Redman (http://en.wikipedia.org/wiki/Redman) - "Fuck the Security"
The Game (http://en.wikipedia.org/wiki/The_Game_%28rapper%29) - "It's Okay (One Blood) (http://en.wikipedia.org/wiki/It%27s_Okay_%28One_Blood%29)"
Big Boi (http://en.wikipedia.org/wiki/Big_Boi) - "What's That Smell"
Messy Marv (http://en.wikipedia.org/wiki/Messy_Marv) - "Get On My Hype"
Ludacris (http://en.wikipedia.org/wiki/Ludacris) - "Get Back"
Paul Wall (http://en.wikipedia.org/wiki/Paul_Wall)- "Sittin' Sideways"
Jim Jones (http://en.wikipedia.org/wiki/Jim_Jones_%28rapper%29) - "We Fly High (http://en.wikipedia.org/wiki/We_Fly_High)"
E-40 (http://en.wikipedia.org/wiki/E-40) - "Tell Me When to Go"
Method Man (http://en.wikipedia.org/wiki/Method_Man) - "Somebody Done Fucked Up"
Lil Jon (http://en.wikipedia.org/wiki/Lil_Jon) - "Crunk Ain't Dead"
Young Jeezy (http://en.wikipedia.org/wiki/Young_Jeezy) ft Lil Jon (http://en.wikipedia.org/wiki/Lil_Jon) - "You're Coming With Me"
Mac Dre (http://en.wikipedia.org/wiki/Mac_Dre)- Boss tycoon
Purple Ribbon All-Stars (http://en.wikipedia.org/wiki/Purple_Ribbon_All-Stars) - "Kryptonite (I'm on It)"
M.O.P. (http://en.wikipedia.org/wiki/M.O.P.) - "Ante Up"

[Segnius]

This soundtrack doesn't sound very good to me... I guess it doesn't really matter though, if you can put your own music in. I hope you can use your own music for all the game modes.

[ac2565]

Segnuis you can use your music and fight to it in the game.

[Shaaady Souljah]

Segnuis you can use your music and fight to it in the game.

does that mean your fighter's theme song & the one you use to do the music damage when timed to the beat can be a custom song?! that would be amazing...

eminem kickin some ass to Til I Collapse...

game kickin some ass to West Side Story...

etc...

[ac2565]

Yeah it was announced somewhere I just cant find it.
I will post the linke when I find it.
Edit:
"For those who prefer to beat down to their own beats, a My Soundtrack feature for the Xbox 360 allows gamers to load their own MP3s into the game, which will affect the environment just like songs from the soundtrack."
link
http://www.gamespot.com/xbox360/action/defjam3/news.html?sid=6165233
4th paragraph

P.S
Artist/Song Title
Big Boi (Purple Ribbon All-Stars feat. Big Boi)/Kryptonite
E-40/Tell Me When To Go
E-40/Go Hard or Go Home
Fat Joe/Make It Rain
Ghostface/The Champ (Remix)
Jim Jones/Crunk Muzik
Jim Jones/We Fly High
Konkrete feat. Big Boi/What's that Smell
Lil Jon/Get Crunk
Lil Jon (and the Eastside Boys)/Get Low
Ludacris/Get Back
M.O.P./Ante Up
Method Man & Redman/Da Rockwilder
Mike Jones/Back Then
Mike Jones/Got it Sewed Up--Remix
Nas/Hate Me Now
Paul Wall/Sittin' Sidewayz
Paul Wall/Trill
Redman/Rush Da Security
Redman/Let's Go
Sean Paul/Head in the Zone
Sean Paul/All Out
T.I./What You Know
T.I./Top Back
The Game/One Blood
The Game/Scream on 'Em
Young Jeezy/I Do This
Young Jeezy/Soul Survivor
Young Joc/It's Going Down
^ soundtrack confirmed
link is above.