Gangsta Boo, also known as Lady Boo (born August 7, 1979) is an American rapper. She was the first and only female member of the Memphis, Tennessee-based rap group Three 6 Mafia. She left the group following the release of their album When the Smoke Clears: Sixty 6, Sixty 1, over money disputes.

Her first solo album, Enquiring Minds, was released in 1998 and reached number fifteen on the Billboard Top R&B/Hip-Hop Albums chart and number 46 on the Billboard 200. The album featured the surprise hit "Where Dem Dollas At!?"

Gangsta Boo released her second album Both Worlds *69 in 2001, which reached number eight on the R&B/Hip-Hop chart and number 29 on the Billboard 200. In 2003, she released her third album, Enquiring Minds II: The Soap Opera. The album peaked at number 53 on the R&B/Hip-Hop chart and 24 on the Independent Albums chart.

In 2009, Gangsta Boo released her 3rd official mixtape "The Rumors" (following her previous mixtapes "Street Ringers Vol. 1" & "Still Gangsta"). She also released 2 mixtapes with DJ Fletch, "Miss.Com" (No DJ Version on iTunes) and "4 Da Hood". On Monday, June 27, 2011, she released her new mixtape with Trap-A-Holics, "Forever Gangsta". In 2013, she joined the Three 6 Mafia spin-off group Da Mafia 6ix, and was significantly featured on their debut mixtape 6ix Commandments. She departed from the group in 2014.