03/06/2014 09:48 EST | Updated 03/06/2014 09:59 EST

Jessica Simpson Is White Hot In New Weight Watchers Ad

Josiah Kamau via Getty Images
NEW YORK, NY - JANUARY 07: Jessica Simpson sighting on January 07, 2014 in New York City. (Photo by Josiah Kamau/BuzzFoto/FilmMagic)

Dayum, Jessica Simpson!

One of our favourite celebrity moms looks absolutely stunning in her latest Weight Watchers commercial thanks to a little white dress.

A photo of the singer was posted on the company's Instagram page on Wednesday, showing her posing in the clingy, sleeveless dress which flaunted her toned legs and arms.

The mom-of-two, who has spoken out about her battle with weight loss since giving birth to her daughter Maxwell in 2012, says in an accompanying Weight Watchers video that she is finally at peace with herself.

"I can honestly say I've never been happier," the 33-year-old says in the commercial. "I have a newfound determination that I'm really proud of."

Jess has good reason to be proud: since the birth of her son Ace Knute in June 2013, the fashion designer has lost 50 pounds through good ol' fashion exercise and making healthy lifestyle choices.

We can't wait to see what the retail magnate looks like when she gets married to fiancé Eric Johnson this year!

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