Song from Dave Chappelle's Block Party

I don't remember exactly who sings it Mos Def I think, It goes something like "1.2.3. it's kinda hard being a M.C. they shot 2 Pac and Biggie"

i kno wut u talkin about

but, what's the name of it?

redefinition mos def and talib qweli

chapelle smokes cok in africa

...so do common, talib kweli, and alll of the other "relevant, non-commercial" rappers... i listen to rap so i can hear about the s-s-s-s-streets, and not their dime/dozen opinions