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 not appear on the final version of the album. Two genuine singles – "Kush", a collaboration with Snoop Dogg and fellow rapper Akon, and "I Need a Doctor" with Eminem and singer Skylar Grey – were released in the United States during November 2010 and February 2011 respectively: the latter achieved international chart success, reaching number four on the "Billboard" Hot 100 and later being certified double platinum by the RIAA and the Australian Recording Industry Association (ARIA). On June 25, 2010, the American Society of Composers, Authors and Publishers honored Dr. Dre with its Founders Award for inspiring other