Last night, Dr. Dre's The Pharmacy premiered an unreleased J Dilla song titled "Gangsta Boogie." Featuring Snoop Dogg and Kokane, the track is a single off Dilla's long-lost album, The Diary. The official audio is shared via Mass APpeal Records' SoundCloud. The Diary is set to drop on April 15 and will contain unreleased work from the late Detroit producer. Listen to the track below.