How is the best way to get a katrina kaif curve?

I weigh about 100 lbs. I want to lose weight within 3 weeks to get that perfect katrina kaif curve. My height is 5foot 3 inches. While on a diet like this i want to still gain height and lose weight. In a busy schedule like mine, i could only fit 3 meals in my day. PLease help me!! I want to look good in a sari!!! :))