Singer Robbie Williams is only truly at peace with himself when he's in the studio, according to his producer pal MARK RONSON.

The FEEL hitmaker was admitted to The Meadows rehabilitation clinic in Arizona last Tuesday (13FEB07) to overcome his addiction to prescription pills, and Ronson is thrilled he's finally sought help after years of bottling up his problems through music-making.

He says, "Robbie is at his happiest when he is in the studio. He does have a lot of demons that he deals with, but he makes sure he does that in private.

"He just doesn't want to burden anybody with his own personal traumas."