(Photo credit: Kristin Burns)

Jessica Simpson is proud of the way she looks.

The Weight Watchers spokeswoman shared this new photo with ABC News exclusively; a behind-the-scenes sneak peek of the commercial she shot last month. Simpson, 33, who first joined Weight Watchers after giving birth to her daughter Maxwell in 2012, went back to the program after welcoming her son in June.

"Simple Start was exactly what I needed to ease back into Weight Watchers after I had Ace," she said. "It was easy, only two weeks and got me off to a great start losing weight."

Jessica Simpson Gives New Details About Her Family

In October, Simpson, opened up about her struggle to lose the weight she gained during her pregnancy.

"I didn't gain as much weight in my second pregnancy, but I still gained a lot of weight," she said. "Any woman, dealing with their body after pregnancy, you look at yourself and you're like, 'What just happened to me?'"

Jessica Simpson Flaunts Her Post Baby-Body In a Swimsuit

However, after the fashion mogul began limiting her junk food intake, while learning to make healthier versions of her favorite fried foods, she was pleased to see the pounds fall away. She also tries to hit the gym four days each week, and counts her steps using a pedometer.

"[My fiancé] Eric [Johnson] always goes on a long walk with me," she said. "I really do think as a mom we can get really caught up and not take time for ourselves, and this is a way for me to take time for myself and it definitely makes me a happier mom."