(Cover) - EN Showbiz - 50 Cent is not friends with Jay-Z.

The rapper, who is currently working on his fifth studio album titled Black Magic, keeps his relationships with other artists strictly professional.

The 35-year-old was discovered by Eminem and with the help of his fellow rapper and Dr. Dre he became one of the world's highest-selling hip-hop stars.

50 has been involved in feuds with other rappers including Ja Rule and The game in the past, and admits being wary of other artists in the industry.

We dont have those kinds of relationships. These people are people I associate with. We are in the same business. We are not necessarily friends. We dont call each other for no reason, he said. Its not like we have something against each other to make us enemies. Me and Jay[-Z] will use each other. Repeatedly. For energy.

50 - real name Curtis James Jackson III has nothing against teaming up with other artists, revealing theres a simple reason why he hasnt done that more.

They dont pick up the phone and call me, he told Vibe magazine. (C) Cover Media