David Darnell Brown (born March 15, 1981 in Nashville, Tennessee), better known by his stage name Young Buck, is an American rapper and former member of 50 Cent's group G-Unit. Signed to G-Unit Records and Cashville Records, he released his debut album, Straight Outta Cashville, in 2004 and his second album, Buck the World, was released in 2007. He is expected to release his third album, The Rehab, sometime in 2009.