For nearly a decade, hip-hop heads knew Cee Lo Green as the humble and grounded member of Atlanta's Goodie Mob group. 2002's solo debut, Cee-Lo Green and His Perfect Imperfections, hinted at the rapper's expansive ambitions, but it was his 2006 team-up with the producer Danger Mouse for the Gnarls Barkley project that recast him as a modern soul man. Having become a beloved mainstream figure, Cee Lo solidified his status with 2010's The Lady Killer—a project that spawned even more crossover R&B smashes.