The artist formerly known as Mos Def—and before that, Dante Terrell Smith—Yasiin Bey plays this SummerStage humdinger in the park. His most recent solo record, 2009's The Ecstatic, was a major hip-hop groundswell, buzzing with choice samples, heady lyrics and classic production. Since then, the artist has won a clutch of Grammys, worked with Kanye and starred in Dexter. This year he's due to release Yasiin Bey Presents. Expect to hear from across the board tonight.