In today?s music industry, few names are as important as those of Jermaine Dupri, the well-known rapper, producer and president of Island Urban Records, and Shawn Carter, also known as Jay-Z, the hugely successful recording artist who also serves as the president of Def Jam Recordings and Roc-A-Fella Records. Success aside, both men have something in common: they both work for Universal Music Group, whose president, Doug Morris, has been waging?