02/09/2014 10:09 am ET | Updated Feb 09, 2014

Jessica Simpson Is A Bombshell In Black On Set Of Weight Watchers Commercial

Jessica Simpson is back to her sexy svelte shape and she is proud of it!

The mother of two posted a photo to Instagram Saturday (Feb. 8), in which she's seen clad in a black halter dress, looking sensational. She captioned it: "Too proud to sit down!! Behind the scenes of my new commercial. Thanks @weightwatchers."

Simpson has been very open in the past about her pregnancy weight gain and her attempts at weight loss, mainly through Weight Watchers. After her first pregnancy with daughter Maxwell, Simpson lost 60 pounds on the point-oriented diet.

"I'm not a supermodel. My body is not bouncing back like a supermodel. I'm just your everyday woman who is trying to feel good and be healthy for her daughter, her fiancé and herself," she said at the time.

After giving birth to son Ace in June 2013, Simpson admitted: "I'm a lot more confident this time around."


Jessica Simpson's Style Evolution