Jessica Simpson, 33, showed off her slimmed down post-baby body for her new weight watchers commercial on Feb. 8.

In celebration of her slim figure, Simpson took to Twitter and Instagram to share her excitement about the weight loss.

“Too proud to sit down!! Behind the scenes of my new commercial. Thanks @weightwatchers.” Simpson posted flaunting her body in a form fitting black dress in a black and white photograph.

According to the New York Daily News, Simpson has been flaunting her 70-pound weight loss in all of her recent appearances.

Last month the fashion designer appeared on Good Morning America where she admitted that sometime this year she and fiancé Eric Johnson, former NFL player, will be wed.

While she’s gearing up for her upcoming with her weight loss, she’s admitted that taking up the role as mom has changed her.

“As a mom, I just have this confidence,” Simpson said last month at Good Morning America. “I just feel so proud of what I’ve done and what I’ve accomplished.”

Photo Courtesy of Wikimedia Commons.