Brooke Valentine (born October 5, 1985 in Houston, Texas), is an American R&B singer-songwriter. She started her musical career as a member of the female group Best Kept Secret. To pursue a solo career, she moved to Los Angeles, California and signed to Subliminal Entertainment/Virgin Records. She released her debut album Chain Letter in March of 2005. It sold 340,000 copies in the US. The album features her hit debut single, "Girlfight" released late 2004, in a collaboration with rappers Big Boi and Lil Jon, a.