Just weeks after announcing his comeback, a new song from Jay-Z's forthcoming CD 'Kingdom Come' hit radio stations and the Internet this past weekend.

The Just Blaze-produced 'Show Me What You Got' features a wailing saxophone loop -- yes, the same one sampled in 'Rump Shaker' -- and Hova referencing his half-hearted retirement attempt. ("What do you want me to do? I'm sorry.")

Unfortunately, it seems the only hate for the track is coming from the folks at Jay's own label. AllHipHop.com reports that staffers are furious over its leak and may be pursuing an FBI investigation to find the person responsible.

Industry insiders were buzzing about the project months ago, so Def Jam should be happy to have kept the music under wraps this long.

Listen to 'Show Me What You Got.'