KELLY OSBOURNE

Kelly Osbourne started her weight-loss journey in 2009. To finally drop down the number on her weighing scale, she adapted different kinds of methods and eventually lost a staggering 70 pounds. She tried hula-hoop parties to burn the calorie and followed the Reverse Diet, which allowed her to eat heavy food in the morning and lighter meals at night. Kelly also became the U.K.’s poster girl for the weight loss craze M-Plan, a.k.a. the mushroom diet.

Here, she had to replace lunch or dinner with a mushroom dish every day for two weeks, which would help her lose four to ten pounds. Nutrition experts credit mushrooms as a great meat substitute with only a fraction of calories. Besides following a new diet, Kelly has also been keeping alcoholic beverages away from her system. Since then, the singer has been more than happy with herself and hopes to inspire her fans along the way, too.