Cee-Lo aka Cee-Lo Green (born Thomas Calloway on May 30, 1974) is an American hip-hop/funk/soul and R&B musician. He is a singer, rapper, songwriter and record producer, best seen as a member of Gnarls Barkley and Goodie Mob, and has recorded two successful solo LPs. Among Cee-Lo's solo hits are the singles "Closet Freak" (2002) and "I'll Be Around" (2003), produced by and featuring Timbaland.

Born in Atlanta, Georgia, he is one of a number of artists to successfully record as both a rapper and singer. He has appeared as a featured singing vocalist on songs by artists such as Esthero, Common, Carlos Santana, Royce da 5'9", Twista, OutKast, Seeed, Black Eyed Peas, DangerDoom, CunninLynguists and Trick Daddy, and sings background vocals on labelmates TLC's #1 hit single "Waterfalls".

His successes as a songwriter and producer include the 2005 hit single "Don't Cha", recorded by The Pussycat Dolls and Busta Rhymes.

Cee-Lo is currently working on a collaboration with DJ Danger Mouse called Gnarls Barkley. The single Crazy from the album was the first single to go straight to #1 in the UK based on download sales alone on April 2, 2006. He is also working with all the members of Goodie Mob to make a new Goodie Mob CD.

His daughter Sierra can be seen on an episode of the MTV television series, My Super Sweet 16 and has a song named after her "Young Man (Sierra's Song)".

Cee-lo is collaborating with producer Jazze Pha to release an album on Columbia Records called Happy Hour.

He is also featured in the Black Eyed Peas song "Like That".

Cee Lo received a Grammy nomination for his song "Gettin' Grown", from his solo album Cee-Lo Green and His Perfect Imperfections.