The blogosphere is buzzing with rumors that the two biggest artists in hip-hop could be planning a collaborative album. According to New York Daily News' Rush & Molloy, Jay-Z and Nas are working on an upcoming album, titled 'The Kings of Hip Hop,' to be released on Jigga's rumored "in-the-works" record label, Carter Music Group in 2009.

If there's any truth to the whispers, the collaboration could catapult the Carter Music Group to magnificent heights with just one release. In the meantime, fans of Jigga man can check out the hip-hop mogul when it hits the road with Mary J. Blige, beginning March 22 in Miami. As for Nas, there's still no word on when the rap star will release his controversial N-word album.