The combination of Mos Def and Talib Kweli has somewhat changed since Mos’ name change to Yasiin Bey, but the duo is still working under the Black Starmoniker. As the two continue to tour together, it is clear the group is as solid as ever. This morning, Black Star released “Fix Up,” a track produced by Madlib, and also released “You Already Knew” produced by Oh No, both from their upcoming mixtape Aretha.