Mariah Carey sat down with some real life 'Jenny Craig' women to shoot a promo video for the program.

She also used the chance to show off her post baby body, and claims that she has lost 30lbs since the birth of her twins.

The video seems very genuine, and Mariah looks great after becoming the spokesperson.  She released a statement about her roll:

Carrying two human lives inside me and doing the best I could. What am I going to do? I'm proud of how hard I worked to get my body back. I had to do this for me."

"As an artist, I use my voice to entertain. But, I want to use my voice to draw attention to a serious matter. Two-thirds of the country is placing themselves at risk for heart disease and diabetes. Largely, that is due to unhealthy eating patterns and lack of physical activity. I obtained a greater understanding of this when I was pregnant with my twins and dealing with my own health issues. That's why I feel so strongly about working with Jenny and the American Heart Association to help Americans get serious about their health as it pertains to these issues which are so important."

Mariah Carey - Jenny Craig Girl Talk