United Kingdom, Aug. 7 -- Eminem never gets writer's block.

The rapper, 52, whose prolific output spans 12 solo studio albums, said he beats the potential problem by constantly noting down ideas in a book he keeps with him at all times.

He says in his new documentary Stans: "Every time I write, there's different stages of it and that's one of the reasons why I keep a book now and I never get writer's block.

"I'm always able to go back in my book and have unlimited ideas. Sometimes I just write my rhyming words down and not the stuff in between, so that it can't be put together if someone finds it."

Eminem's new film tells his story in his voice and through famous fans including Ed Sheeran and Dr Dre.

It comes after Eminem and Dr Dre ...