See more stars slimming. Jessica Alba Jessica Alba was also rated as the actress with the most perfect face proportion in the star industry, but her waist proportion is also perfect. Secret recipe of star slimming and shaping: When it comes to how jessica alba's female star loses weight, it still depends on her postpartum comeback last year. At first, she tried to lose weight through fitness exercise because she was preparing to take photos of her calendar. "But the fitness was so bad that she soon gave up and never exercised again.