50 Cent happy to finish mixtape

50 Cent is "back on the grind" now his mixtape is finished.

The rapper announced the highly-anticipated launch of his fifth studio album with Interscope at the end of last month. Alongside his untitled record - which is scheduled for a July 2 release - 50 has been working on his Gangsta Grillz mixtape with DJ Drama.

It's understood the hip hop star is looking forward to focusing his efforts on his forthcoming album now that he's wrapped up work on the mixtape.

"SMS audio my gangsta grillz tape is done it hits the street the 15th. I'm back on the grind now watch me work (sic)," he wrote on his Twitter page.

Gangsta Grillz is due for release on May 15.

50 also updated fans on his new album. The 36-year-old star revealed that he's doing some last minute engineering tweaks on the record before it hits shelves.

"SMS audio the standard for high quality sound. I'm almost done mastering the album (sic)," he wrote.

50 has had problems with his record label over the album, but he recently revealed that he's ready to launch his new material.

"I've had issues because I've had records that I thought were good enough to start the momentum, and then the actual campaigns have leaked out and it came from the system," he recently explained. "Now we're in a better space because we've been communicating with each other and everybody's on the same page so I'm looking forward to releasing the album July 2."