Released late in 2003, Kelis' "Milkshake" helped young and old get their freak on throughout 2004, and the ensuing album proves the Harlem-raised singer's off-kilter but bizarrely catchy R&B hit was no fluke: The Neptunes, Andre 3000, Raphael Saadiq and fiancee Nas all help Kelis shake it up.

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