Earl Simmons, known professionally as DMX, was an American rapper and actor. He began rapping in the early 1990s, and released his debut album, It's Dark and Hell Is Hot in 1998 to both critical acclaim and commercial success, selling 251,000 copies within its first week of release. He released his best-selling album,... And Then There Was X, in 1999, which included the hit single "Party Up (Up in Here)". Since debuting in 1998, DMX has released seven studio albums.