That sounds AWESOME. There aren't enough games that utilize hip-hop in a good manner. There are some incredible hip-hop artists and songs out there that have little to no representation in video games and hopefully MadWorld will pick good representatives.
My Games of 2011:
The Legend of Zelda: Skyward Sword
Elder Scrolls V: Skyrim
Super Mario 3D Land
Uncharted 3: Drake's Deception