The line between musical genres have become blurred over the years. With Lil Wayne crossing over to with his Rebirth album and guys like Kid Cudi and Kanye singing instead of rapping, hip-hop has become open to change.

As rappers cross over, so do rockers. Kid Rock has always had a strong hip-hop background, and is aiming to show it on his next album, collaborating with the likes of both Lil Wayne and T.I.

The Detroit rocker was gearing up to drop a new album this fall, but opted to take his project to veteran producer Rick Rubin, to go over what he's created, including the rap collabos.

Rock will head back into the studio after he wraps up his current summer tour.

In addition to Weezy working on his rock album, producer Timbaland is also working outside the hip-hop genre. He recently signed on to executive Seattle Rock veteran Chris Cornell's new album Scream. He joined formers with Cornell to tap his more soulful side.

No word on when this project is slated for release though.