Rap superstar Eminem is working out and back in the studio, just two months after a health scare prompted him to pile on the pounds.

The star suffered pneumonia over Christmas (07), and was photographed in January (08) looking ill and overweight, raising fears for his health from his own mother.

But sources reveal the Stan hitmaker is fighting back and recording new tracks with longterm pal Dr Dre.

An insider tells the New York Post, "He has been cutting new tracks with Dr. Dre. They still have a ways to go, but so far it’s really good."

A representative confirms the reports, adding that Eminem is busy hitting the gym: "He’s always in the studio and has worked with a trainer before."