In 1997, Mos Def’s partnership with Talib Kweli produced the old school classic Black Star. By 1999, it was another Mos Def partnership that took hip hop by storm. Ayatollah produced his hit ‘Ms. Fat Booty’, the first single off his solo album Black on Both Sides. Mos Def’s humorous gibes are offset by the regal sample of Aretha Franklin‘s ‘One Step Ahead’. Ayatollah was a producer with some crate-digging form. The following year he would find a flip of Gladys Knight & the Pips’ Queen of Tears for Ghostface Killah‘s ‘Wu Banga 101’.