Video: Black Star Performs “You Already Knew” On Jimmy Fallon

The artist I still call Mos Def and Talib Kweli performed "You Already Knew" as Black Star On Jimmy Fallon this week.

The baddest band in late night, The Roots backed up Black Star. They were on Fallon to promote a new FREE mix tape due out this Spring.

They go after politics yet again and put their aim on Rick Perry, The Tea Party and Obama.

No one is safe with Black Star in the mix. Check it out.-DocFB

Diagnosis: You already knew...and that's the truth!