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First, it was Jay-Z. Now, Nas becomes the second hip hop heavyweight that Diddy is getting back into the booth for, according to

[Nas] also mentioned that the LP is two weeks from completion, and will feature production by DJ Toomp, Diddy, Jermaine Dupri, and long-time collaborator Salaam Remi who was behind “Made You Look” and “Thief’s Theme.”

Via Wikipedia.