Jessica Simpson and Other Celebs Making Big Cash with Weight Loss Deals

Jessica Simpson made the rumors official: She's signed on to lose the post-baby pounds with Weight Watchers.

"So excited to be part of the Weight Watchers family," she tweeted on May 30.

The singer has reportedly ditched fast food to get ready for the weight loss, but she's still considering which trainer she'll use to whip herself into shape. The two options are reportedly Danny Musico, her fiance Eric Johnson's trainer, and Mike Alexander, the man who got her into shape for 2005's "Dukes of Hazard," according to US Weekly.

"As soon as Jessica heals from the C-section, she is extremely determined to get back in the gym and work out," a source told US Weekly. "She wants to show the world and is excited to do it."

It's not confirmed how much weight she wants to lose with her $4-million Weight Watchers endorsement deal - we've heard anywhere from 60 lbs. to close to 100 lbs. However, we do know that she'll have plenty of motivation since other celebrities have dropped the lbs. with help of weight loss program endorsements.

Jennifer Hudson

Jennifer Hudson is basically the face of Weight Watchers these days. The singer dropped 80 lbs. on the program - it's like she just emerged one day with a dramatically smaller frame. According to a post on Weight Watchers, Hudson's did it by eating foods like Kashi GoLean Crunch Cereal, skim milk, sweet potatoes and lots of Greek yogurt.

Charles Barkley

Charles Barkley came out in January saying that Weight Watchers had helped him drop 38 lbs. off his famously hefty frame. However, he told fellow TNT sports announcers Reggie Miller and Kevin Harlan that it was all a scam.

"I thought this was the greatest scam going-getting paid for watching sports, this Weight Wat! chers th ing is a bigger scam," he said, thinking that the microphones were off. He received some flack for the comment, though it seems like he meant that earning money for doing something he'd do for free - like eating - is just like getting money for something else he loves, sports.

Or at least that's what we think he meant.

Mariah Carey

Mariah Carey gave birth to her long-awaited first children -- twins Moroccan and Monroe last May - but she wasn't in a good place during the pregnancy and gained a lot of weight.

"Edema was the probably the most painful thing I went through during my pregnancy," she told USA Today in November 2011. "My legs looked three times the size of what my legs do right now. I thought I would never be the same person again."

After their births, she signed on with weight loss program Jenny (formerly Jenny Craig) to lose weight. She lost 30 lbs. between July and November 2011 with plans to lose more.

"Since having the babies, I realize that 90 percent of losing weight is my diet," she told Shape magazine in April.

Janet Jackson

Janet Jackson - like Carey - has struggled with her weight for years. She's finally dropped the weight - she says for good - by using another weight loss program, NutriSystem.

The program revolves around eating pre-packaged foods sent directly to her door. The best part for Jackson? It allowed her to keep eating the foods that made her gain weight in the first place.

"Chocolate, cake, caramel apples-there aren't many thing! s I don' t love," she told Prevention of her favorite foods. However, that food led her dangerously close to diabetes. She's lost a considerable amount of weight on NutriSystem, but she hasn't said how much.

"I'm not viewing this as a diet," she said. "I'm not putting a number on it."

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