Mos Def continues his late night circuit promotional tour of sorts by performing Casa Bey on Jimmy Fallon’s show. You gotta love it, Mos Def with The Roots in the background on late night TV. Download Mos Def’s album for $3.99 at Amazon.com. The deal is still going. What more can you ask for? $3.99 people… go and make the purchase. Mos Def is back on his hip hop ish. Props to RapRadar.