2001 (Dr. Dre album) were later cut from the final track list. The tracks have been leaked later on several mixtapes, including "Pretox". The album's production expanded on that of "The Chronic", with new, sparse beats and reduced use of samples which were prominent on his debut album. Co-producer Scott Storch talked of how Dr. Dre used his collaborators during recording sessions: "At the time, I saw Dr. Dre desperately needed something. He needed a fuel injection, and Dre utilized me as the nitrous oxide. He threw me into the mix, and I sort of tapped on a new flavor with my whole piano
Dr. Dre album for an artist to enter the "Billboard" 200 album charts at number one. In 1994 Dr. Dre produced some songs on the soundtracks to the films "Above the Rim" and "Murder Was the Case". He collaborated with fellow N.W.A member Ice Cube for the song "Natural Born Killaz" in 1995. For the film "Friday", Dre recorded "Keep Their Heads Ringin'", which reached number ten on the "Billboard" Hot 100 and number 1 on the Hot Rap Singles (now Hot Rap Tracks) charts. In 1995, Death Row Records signed rapper 2Pac, and began to position him as their major star: