Jessica Simpson giving up fast food, pop-tarts and mac n’ cheese

Jessica Simpson is ready to get her pre-baby body back. Simpson tweeted earlier this week about joining Weight Watchers saying, “So excited to be part of the Weight Watchers family.” The fashion mogul reportedly earned $4 million in the deal she signed with Weight Watchers. “The cool thing about [Weight Watchers] is that it focuses on healthy habits for the long-term (and I can still indulge in my guilty pleasures every now and then, too),” Simpson wrote on her Facebook page. “I have actually gotten a group of friends together who are going to be doing it with me.”

Sources close to Jessica say since she is nursing baby Maxwell, she’s cutting out fast food and some of her pregnancy snacks, which included Pop-Tarts and Kraft Mac ‘N Cheese. “She has to cut down on fast food. Besides, it’s a great way to jump-start the massive diet ahead,” the source told UsWeekly.