Mariah Carey has become the new spokesperson for Jenny Craig's diet plan after losing 30 pounds of weight by using the company's meal plan.

Carey said she packed on pounds while carrying her twin babies with husband Nick Cannon. She was so disgusted with her body while she was at her peak of weight that she would not even let her husband Nick Cannon see her without covering up herself first. The 42-year-old songbird gave birth to Monroe and Moroccanher twins in April.

In July, the Grammy winner set her mind to regain her figure. So she turned to advisers at the weight-loss company Jenny Craig for help in speeding up her slim-down.

It was a huge blessing to be able to have the babies, Carey told the U.S. Weekly, but I felt trapped in my body because I couldn't move.

In the company, Carey felt a kinship with everyone she worked with as they had all been struggling with their own weight issues, and she gives thanks to the healthy eating program for helping her get back the pre-baby curvy body. And it turns out Carey didn't take the routes of macrobiotic diet or any fitness contrivance. She just strictly kept a 1,500-calorie-per-day intake and three workouts a week. Chasing after the twins is not included into her regimen.

I feel better in every way. ... I was in a bad place physically during my pregnancy, she told USA Today.

With the help of Jenny diet program, the star successfully lost 30 pounds. She had lost 40 pounds in water weight after giving birth.

Carey's song Make It Happen will feature in the new Jenny Craig TV adverts. The singer will serve as Jenny's lead Brand Ambassador throughout the American Heart Association's My Heart. My Life initiative. The initiative is supported by Jenny, who has been committed to combating the overwhelming health issues caused by weight-related diseases.

Carey is excited about encouraging others to live active, healthy and happy lives. As an artist, I use my voice to entertain. But, today I want to use my voice to draw attention to a serious matter, she said.

Mariah Carey is one of the world's best-selling music artists with more than 200 million albums, singles, and videos sold worldwide. She has 18 number one single on the Hot 100, which is the highest among all solo artists. A philanthropist, Carey has also donated time and money to organizations such as the Fresh Air Fund.