2001 (also referred to as The Chronic 2001) is the second studio album by American hip hop recording artist Dr. Dre, released on November 16, 1999, by Interscope Records. It is the follow-up to his debut album The Chronic (1992). It was produced primarily by Dr. Dre and Mel-Man, as well as Lord Finesse, and features several guest contributions from fellow American rappers such as Hittman, Snoop Dogg, Kurupt, Xzibit, Nate Dogg, and Eminem. 2001 exhibits an expansion on his debut's G-funk sound and contains gangsta rap themes such as violence, promiscuity, drug use, street gangs, and crime.