Jessica Simpson has teamed up with another singer who has had an even greater diet success story - Academy Award-winning singer Jennifer Hudson.

Simpson, 32, and Hudson, 31, are spokespersons for the country's leading weight loss program and got together to appear in Weight Watchers' newest commercial.

The ad, titled "Expect Amazing," was posted on YouTube on Dec. 2 and will air on national television spots on Dec. 3.

In the video Hudson says:  "I naturally became a healthier me."

Hudson famously went from a size 16 to a size 6 after she became Weight Watchers' celebrity spokesperson in 2010.

Simpson teamed up with Weight Watchers in May of 2012 following the birth of her first child, Maxwell Drew. She later lost more than 50 pounds.

In the commercial, Simpson says, "I amazed myself."

Simpson also covers the latest issue of Weight Watchers magazine. In their January/February 2013 issue, the fashion mogul told the magazine about her diet while filming her reality show, "Fashion Star."

"I'm crazy about smoothies, so I bring fruit chopped up and ready to go. That way, I can sip the same smoothie all morning long between takes," Simpson told Weight Watchers magazine. "If it thins out, I put it back in the blender with crushed ice for a few minutes."

On Dec. 25, Simson announced that she is expecting her second child. Weight Watchers confirmed that she will remain their current spokesperson on Twitter.

"Congrats to @JessicaSimpson, Eric and big-sister-to-be Maxwell! Your WW family is so thrilled for you. What an amazing year you've had! (sic)," the diet company tweeted.

The firm has also announced that they will continue to run ads promoting the 32-year-old beauty's 60lb weight loss, as well as pushing a new commercial in which she announces her pregnancy.

A Weight Watchers spokesman told ABC News that "there has not been changes made" to their business agreement with Simpson, but added that she will not continue the program during her pregnancy.

Simpson "will not be following the program during the pregnancy while her weight and well-being are monitored by her obstetrician, as is recommended for any woman during pregnancy, " a spokesman told ABC News. "After she gives birth, Jessica and her doctor will decide when she may resume following the Weight Watchers program."

Check out Jessica Simpson and Jennifer Hudson in their brand new commercial below!