Thomas DeCarlo Callaway-Burton (born May 30, 1975), known professionally as CeeLo Green (or Cee Lo Green or simply Cee-Lo), is an American singer, songwriter, rapper, record producer, and actor. He is known for his soul-infused delivery in hip hop and R&B, displayed in his signature song "Crazy" (with Danger Mouse as "Gnarls Barkley") and his solo single "Fuck You."

Born in Atlanta, Georgia, Green came to initial prominence as a member of the Southern hip hop group Goodie Mob in 1991. Following three studio albums with the group, he subsequently began a solo career and released two modestly successful albums for Arista Records: Cee-Lo Green and His Perfect Imperfections (2002) and Cee-Lo Green... Is the Soul Machine (2004).

Green's next project was Gnarls Barkley, a collaborative duo with record producer Danger Mouse. Their debut album, St. Elsewhere (2006) quickly achieved success with its lead single "Crazy," which charted within the top five in 20 countries including the US and UK; the album was followed up with The Odd Couple (2008). In 2010, Green resumed his solo career with his funk-inspired third album The Lady Killer, which spawned his biggest solo hit, "Fuck You" (more commonly censored as "Forget You"). The song peaked at number two on the Billboard Hot 100, reached the top ten in 13 countries, and won a Grammy Award for Best Urban/Alternative Performance. He has since released three solo additional solo albums: Cee Lo's Magic Moment (2012), Heart Blanche (2015), and CeeLo Green Is Thomas Callaway (2020), as well as two reunion albums with Goodie Mob, Age Against the Machine (2014) and Survival Kit (2020).

From 2011 to 2013, Green was a judge and coach on the American reality television singing competition The Voice, appearing on four of its seasons. He voiced Murray the Mummy in the 2012 animated feature film Hotel Transylvania, and also appeared in numerous television programs and films including his own short-lived series, CeeLo Green's The Good Life on TBS. Green has appeared in various commercials, including for 7 Up, Duracell, M&M's, and sake brand TYKU. His work has earned a number of accolades, including five Grammy Awards, a BET Award, a Billboard Music Award, and a Brit Award.