Akon is being sued by his longtime business partner, Devyne Stephens, who claims that he owes him over $150 million in unpaid fees from their work together in the music business. Stephens is the music exec who helped launch Akon's career, and his Konvict Music label, and in a new lawsuit he says he's supposed to be getting 40% of everything Akon's earned since 2006. He says their contract gives him a cut of record sales, touring rights, royalties and more.