Instrumental version of the second studio album by the American hip-hop artist. Originally released in 1999 as the follow-up to his 1992 debut album The Chronic, the record was produced primarily by Dr. Dre and Mel-Man, as well as Lord Finesse, and features several guest contributions from fellow rappers such as The D.O.C., Hittman, Snoop Dogg, Kurupt, Xzibit, Eminem, and Nate Dogg. 2001 exhibits an expansion on Dre's debut G-funk sound and contains gangsta rap themes such as violence, promiscuity, drug use, street gangs, sex and crime.