50 cent - Back down
Lethal B - Kickback, Pow, Mind your Head, Fuck you
For Americans, don't neglect English hip hop, I know its alot faster and requires more skill but I think its great to work out to especially G's like Lethal B, Kano, Dizzee rascal, Taper, Anim8ed, Taz, Jammer and local gang music LOL...serious its siiicckk!