LOS ANGELES, CA  [Tuesday Jul.31.2007]  /Mix103FM.com/ -- Jay-Z may be making a move over to Columbia Records, home to his superstar girlfriend Beyonce Knowles.

Rumors have surfaced that the mogul is leaving his post as president and CEO of Def Jam after producer Jermaine Dupri took over duties as president of the label's urban division back in February.

A source tells the New York Daily News, "There isn't room for two kings at one label." "Why would Island bring in another power-hitter urban guy?"

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