"Black on Both Sides" is a 1999 album by the American rapper Mos Def, also known as Yasiin Bey. The album blends various musical styles, including hip-hop, jazz, and soul, showcasing Mos Def's lyrical prowess and social commentary. It addresses themes of identity, race, and the African American experience. The album features notable tracks like "Ms. Fat Booty" and "Mathematics," which highlight Mos Def's storytelling ability and thought-provoking messages. "Black on Both Sides" is often regarded as a classic in the hip-hop genre, influencing many artists and contributing to discussions about race and culture in America.