Jessica Simpson Weight Loss: How Did Star Lose 60 Pounds?

Reporter: In such six months, singer and realtor jessica simpson had gone from this to this. The new photos taken over the weekend is the most revealing look at her post baby bode since september.... See More

Reporter: In such six months, singer and realtor jessica simpson had gone from this to this. The new photos taken over the weekend is the most revealing look at her post baby bode since september. After having the baeshgs I've had to really focus and start training. Reporter: And all that training now appears to be paying off. Simpson said she shed 60 pounds since giving birth to daughter maxwell in may. Just ten pounds shy of her prebaby weight. The weight watchers spokesman said in addition to changing her training habits she has another one weapon. Her personal trainer. All right. Harley pasternak trained simpson along with jennifer hudson. Reporter: Phase one, cardio warmup. That's a march? Reporter: I don't know. You would be the worst soldier. Reporter: Upper body strengthening. Okay. I feel that. The same for the lower body. Is this helping my bootie? Helping your bootie, your thighs. Reporter: Phase four, core training. How's that feel? Reporter: I feel that. Reporter: And the fifth phase,le cooldown. Okay! Simpson said she's not giving up on shedding those last few pounds. But she is giving up her favorite pregnancy craving, macaroni and cheese. For "good morning america," abbie boudreau, los angeles, abc