Want to find out how Jessica Simpson lost her weight? The "Dukes of Hazzards" actress unveils how she shed pounds in the latest commercial for WeightWatchers.

"This body made two amazing little human beings," she says in the 30-second ad clip, which was aired for the first time on Monday night. "I love this body and what it's capable of. No matter what size, but this version feels really good." The gorgeous blonde flaunts her newly slimmed-down figure in a series of tight black dresses that certainly compliments her body.

Simpson also shared a photo of herself from the campaign via Instagram. "New @weightwatchers commercial aired tonight! Yay!" she wrote the caption following. "Tomorrow morning get all the details on GMA!!!"

The mother-of-two signed a $4 million deal to represent the diet program company while she was pregnant with her first child, daughter Maxwell, who was born in May 2012. However, by December of that year, right after her first ad ran, she announced that she was pregnant again and her endorsement deal was consequently put on hold until she gave birth to her son Ace in June 2013.

Simpson recently claimed that she is now back to her pre-pregnancy weight with the help of the weight-loss program, losing 50 lbs in total since Maxwell's birth.

Jessica Simpson is currently engaged to football player, Eric Johnson, and the couple plans to wed this year after dating since 2010. She revealed that the upcoming wedding inspired her to maintain her new diet regime. "Knowing that I have the wedding coming up is an incentive to stay on WeightWatchers, count my points and stay in the gym," she said. "I mean, when you see my dress, you'll know."