Earl Simmons, better known by his stage name DMX, is an American rapper and actor who rose to fame in the late 1990s. His stage name pays tribute to the Oberheim DMX drum machine, an instrument he used when he made his own rap beats in the 80's. To date, his best-selling album is his 1999 album ...And Then There Was X, which featured the hit single "Party Up (Up in Here)". In 2002, DMX wrote an autobiographical book titled E.A.R.L.: The Autobiography of DMX.