Nas

Nas, who recently squashed his long-standing beef with Jay-Z by signing to Jay-Z's Def Jam label, told a packed house last night at NYC's Radio City Music Hall that he will release his first Def Jam album in September.

The Queensbridge rapper made the announcement last night on stage as part of labelmates The Roots' two-night, star-studded show , capping off his 15-minute set by saying, "I'm working hard for y'all. I got an album coming out in September."

A Def Jam spokesperson told Billboard that the album is titled Hip-Hop Is Dead, and it will hit stores in September. The album will be jointly promoted by Def Jam and Nas' former label, Columbia Records, under a revenue-sharing agreement.

Hip-Hop Is Dead will be the follow-up to 2004's Streets Disciple, which has sold 694,000 copies in the US, according to Nielsen SoundScan. In his 11 years with Columbia, Nas' catalog has sold 12 million units.

The Roots' show last night featured a slew of guest appearances, including Common, Talib Kweli, Big Daddy Kane, comedian Dave Chappelle, Rahzel, Jazzy Jeff, and Skillz, although a blog posting by Roots' drummer ?uestlove indicated that some other surprise guests did not show.

Tonight's show is expected to feature performances by Erykah Badu, Mos Def, J. Davey, and Angelique Kidjo.