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 magazine's list "The Immortals: The Greatest Artists of All Time". Kanye West wrote the summary for Dr. Dre, where he stated Dr. Dre's song "Xxplosive" as where he "got (his) whole sound from". In November 2006, Dr. Dre began working with Raekwon on his album "Only Built 4 Cuban Linx II". He also produced tracks for the rap albums "Buck the World" by Young Buck, "Curtis" by 50 Cent, "Tha Blue Carpet Treatment" by Snoop Dogg, and "Kingdom Come" by Jay-Z. Dre also appeared on Timbaland's track "Bounce", from his 2007 solo album, "Timbaland Presents Shock Value" alongside, Missy Elliott,