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 and Justin Timberlake. During this period, The D.O.C. stated that Dre had been working with him on his fourth album "Voices through Hot Vessels", which he planned to release after "Detox" arrived. Planned but unreleased albums during Dr. Dre's tenure at Aftermath have included a full-length reunion with Snoop Dogg titled "Breakup to Makeup", an album with fellow former N.W.A member Ice Cube which was to be titled "Heltah Skeltah", an N.W.A reunion album, and a joint album with fellow producer Timbaland titled "Chairmen of the Board". In 2007, Dr. Dre's third studio album, formerly known as "Detox", was slated