In 2003 Cam'ron teamed up with his fellow Diplomats Members Jim Jones, Juelz Santana, and Freekey Zeeky to release the Diplomats' debut double disc album, Diplomatic Immunity, in 2003 under Roc-A-Fella/Diplomat Records, which was quickly certified gold by the RIAA. The album featured the lead single "Dipset Anthem", a remix to Cam'rons hit "Hey Ma" and the (street anthem) single "I Really Mean It", as well as boasting production from Kanye West, Just Blaze, and The Heatmakerz. A year later, the Diplomats released their second album, Diplomatic Immunity 2. Although not as successful as their debut, it still was boosted to gold status. Around this time in the height of his mainstream fame, Cam'ron was known for popularizing the color pink. During this period, Cam'ron was always seen wearing pink clothing and even bought an all-pink Range Rover, which can be seen in his video for "Killa Cam". Cam'ron's fourth studio album, Purple Haze, was released on December 7, 2004 on Def Jam/Roc-A-Fella Records. It featured collaborations with Kanye West, Jaheim, Twista, Juelz Santana, and various other artists and ultimately reached gold status. The album was also a critical success, being ranked 114th on Pitchfork Media's Top 200 Albums of the first decade of the 21st century List, and 10th on Rhapsody's Hip Hop's Best Albums Of The Decade List. However, after feeling that the album was poorly promoted and that his projects were not receiving the attention they deserved, Cam'ron requested his release from Roc-A-Fella Records.  On April 28, 2005, Cam'Ron officially joined the Warner Music Group under the Asylum Records imprint. He began work on what would be his first project for the new label. Cam'ron's fifth studio album, titled Killa Season, was released on May 16, 2006 featuring production from long term collaborators The Heatmakerz, Charlmagne and Ty Fyffe, as well as others such as Alchemist and I.N.F.O.. Along with the album, Cam'ron released his first film, in which he wrote, directed and starred in, also titled "Killa Season". Despite selling 112,000 units in the first week and debuting at number 2 on the charts, Killa Season failed to have the same sales strength as his two previous releases, but Killa Season became certified gold.  After the release of Killa Season and his feud with 50 Cent in 2007, Cam'ron took a three-year hiatus from music after his mother suffered three strokes which left her paralyzed on her left side. He moved to Florida with her to set up her rehabilitation and therapy, and stayed there until she had fully recovered. Cam'ron's 2009 album, Crime Pays was released on Asylum/Diplomat Records, featuring the majority of the production handled by Skitzo and AraabMuzik. Although none of the singles from, the album managed to chart, the album still reached number 3 on the Billboard 200 but only sold 150,000 units, making this the lowest selling album of his career. In 2009 Cam'ron formed a new label, Dipset West and new group the U.N..

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