What is the name of the artist and song title from the PS2 game Def Jam Vendetta?

Question

The lyrics are:

He disrespected you...you better do somethin'
Don't turn trick now...do somethin'
Don't stand and look around...do somethin'

Answer 1

Comp - Do Sumthin

Weirdly enough, it seems they can't decide on a name for the song. It's also referred to as "Do Something" on his website and "Do Sumptin" on the Cradle 2 The Grave soundtrack.