Jessica Simpson

Jessica Simpson has something to smile about — and she's ready to share it with the world.

The singer-actress-designer posted a photo from her new Weight Watchers campaign in which she is seen posing in skinny jeans and a white button-down top. "Couldn't stop smiling on set for my new Weight Watchers campaign today," she captioned the photo.

More dramatic celebrity weight loss

Simpson originally signed on to endorse Weight Watchers in May 2012 after giving birth to her first child, daughter Maxwell. She dropped more than 40 pounds, but soon discovered that she was expecting again and was obviously forced to put her weight loss goals on hold. Simpson welcomed her second child, son Ace Knute, in June, and Weight Watchers confirmed that she had gone back on their points-counting program in August.