Brooke Hogan is a Z-list celebrity whose weight fluctuates. Notice how slim she is in the middle photo; her stomach muscles are well defined. Later, Brooke gained some weight. I guess her father’s admonitions against eating chocolate chip cookies were ignored.

At her slimmest, in the middle photo, Brooke was very likely working out twice a day and sticking to the Atkins diet (she was seen mentioning the diet plan on her family’s reality tv show).