Rapper 50 Cent is hinting at retiring from music following the release of his much-delayed album Street King Immortal.

The album was supposed to hit stores in 2011, but it has yet to be released. The In Da Club star is keen to finish the project, but reveals he has no plans to start work on a follow-up after it's done.

"You know how some artists got to have confirmation that they're right?" he asks MuscleandFitness.com. "I have that confirmation in... 35, 40 million (albums) that I already sold."

He also explains he sometimes tires of playing some of his older music during his shows.

"I think every (artist) gets tired of it, creatively," he continues. "There is a point when a new idea is exciting. (But) when your first impression is the largest-selling hip-hop album, then people want to hear that music. It's the right balance and combination - the new song or energy is what I want to perform at that point. I'll do that and blend in the hits."