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!?"