Jay-Z

OBAMAFINISH_11509

President Barack Obama is flanked on stage by musicians Jay-Z, left, and Bruce Springsteen at a campaign event at Nationwide Arena, Monday, Nov. 5, 2012, in Columbus, Ohio. (AP Photo/Carolyn Kaster)

President Barack Obama is hugged on stage by musician Jay-Z, center, as musician Bruce Springsteen, stands right, at a campaign event at Nationwide Arena, Monday, Nov. 5, 2012, in Columbus, Ohio. (AP Photo/Carolyn Kaster)

OBAMAFINISH_11509

President Barack Obama is flanked on stage by musicians Jay-Z, left, and Bruce Springsteen at a campaign event at Nationwide Arena, Monday, Nov. 5, 2012, in Columbus, Ohio. (AP Photo/Carolyn Kaster)

OBAMAFINISH_11503

President Barack Obama is hugged on stage by musician Jay-Z, center, as musician Bruce Springsteen, stands right, at a campaign event at Nationwide Arena, Monday, Nov. 5, 2012, in Columbus, Ohio. (AP Photo/Carolyn Kaster)

20120522-161145-pic-515885865.jpg

Jay-Z talks about plans for a benefit music festival he is putting together in Philadelphia over Labor Day weekend. (Associated Press)

20120313-162751-pic-45239319.jpg

Jay-Z kicked off the South by Southwest festival in Austin, Texas, this week with a hit-filled, 80-minute performance at the AMEX Sync Show on Monday night. (Associated Press)

20111204-153611-pic-195645520.jpg

A textbook used in the Georgetown University class called Sociology of Hip Hop: Jay-Z praises the rapper as a "philosopher king." (Associated Press)

Nets_Jay_Z.sff.jpg

FILE - In this March 11, 2011 file photo, recording artist Jay-Z watches the New Jersey Nets and the Los Angeles Clippers play an NBA basketball game in Newark, N.J. (AP Photo/Bill Kostroun, File)

Yankees_Jay_Z.sff.jpg

In this Nov. 6, 2009, photo, New York Yankees' Alex Rodriguez, left, and hip-hip mogul Jay-Z stand during an NBA basketball game between the New York Knicks and the Cleveland Cavaliers in New York. Jay-Z is teaming up with his favorite baseball squad on co-branded clothes that will be sold exclusively at Yankee Stadium beginning next week. All the items, from baseball caps to T-shirts and hooded sweat shirts, will feature Yankees and Jay-Z logos. (AP Photo/Kathy Kmonicek)