Cant figure this out

I heard a song the other day it sounded like it was either the roots, or gnarls barkley, although im not sure it was either of them.

The song was rap rock ish, and had lines of a man speaking in a british accennt at certain intervals of the song. One of the only lines i can remeber is the british guy saying "my karma( then karma echos twice fading)" i know its not a lot to go on, but any ideas?