Washington: British pop star Robbie Williams is desperate to quit his addiction to chocolate. He is worried about the effect his sweet tooth is having on his waistline. Williams, who has successfully battled his drug and alcohol problems, is now all set to kick his cravings for sugar. He says it could add extra ounces to his already heavy weight, which the star keeps camouflaged at home under tracksuits and three-quarter length coats. "I'll be honest. I'm doing this mad thing where I'm trying to fool myself into believing I'm not eating chocolate. About five o'clock every morning I wake up with this longing for sugar. I'll walk all the way down to the kitchen," Contactmusic quoted the singer, as saying. "So there I am in a soporific state pretending I'm not getting through a block of chocolate the size of Sussex (English county)," he had added. "I'm more at home in tracksuits and trainers but there is something about a three-quarter length coat. You're thinking, 'Yeah people are staring, but act like you're ace and maybe they won't see the little fatty you saw back in your dressing room," he said further.