Most of the celebs on this list opted for carbs as an alternative to fats and sugars, but singer and stage sensation Christina Aguilera has done the opposite. She chose to add more healthy proteins rather than carbs. And it has paid off. Some time ago, she looked as if she had more booty than Kardashian. After losing weight, she looked so damn sexy shaking her hips to spark with Mick Jagger on the stage. This is what weight loss can do for you.