Madonna recently revealed that her husband, Guy Ritchie, used the cookie diet to lose weight. On the 800-calorie-per-day cookie diet, a person can eat one meal a day and up to six nutritional cookies.

She didn't really appreciate the diet, however. Though Guy lost weight, apparently, he also lost his libido. Madonna said, "My husband went on that cookie diet and it was such a turn-off because he didn't want to have sex." Not exactly an endorsement for the weight loss product, I'd say.

Though Ritchie, as well as fellow celebs Kelly Clarkson and Jennifer Hudson, lost weight on the cookie diet, its 800-calorie per day regimen is far too restrictive to be healthy. To learn some weight loss tricks that are healthy, check out AOL Body's diet page.