It might not be a good idea to publicize Nicole Kidman�s �diet nightmare,� apparently triggered by a secret torment in the aftermath of her split with Tom Cruise, but the actress has demonstrated that when you don�t �pig out,� you not only don�t put on weight, you lose it.

The 5-foot-10 star, who has weighed in as much as 130 pounds, has dropped to a stunning 115 pounds, while going through her �grieving process� over the collapse of her marriage with Cruise. And she�s taken off the pounds with a diet that allows her only a meager 900 calories.

Some days, friends say she eats only soup, broth or a little salad with lemon juice. Sometimes, she skips lunch entirely or goes to bed without dinner, claiming she�s just not hungry. Unfortunately, it�s become a �dieting nightmare� for Kidman, and friends have pleaded with her to eat for fear she may be endangering her health. But, that�s not to say Nicole�s strict diet might not help someone else to take off the pounds who is in good health but �a little hefty� by Hollywood standards.