11/09/2011 10:58 am ET Updated Jan 09, 2012

Mariah Carey's Amazing 70-Pound Weight Loss (VIDEO)

Mariah Carey is apparently over the trauma she endured during what she called a 47-week pregnancy, and she has a hot new body to prove it.

The singer and mom of six-month-old twins, Morrocan and Monroe, appeared on "The Rosie Show" on OWN yesterday in her true diva fashion, being lowered onto the stage riding on a crescent moon and wearing a skin-tight black mini-skirt and leather jacket.

She went on to tell host Rosie O'Donnell that she didn't think she would ever be the same person, referring to the weight she put on carrying the twins. Much of it, she says, was water weight, due to her difficult pregnancy. "In the beginning, when I first had the babies, I had so much edema ... water and swelling. Most pregnant woman have that just in their feet," Carey said, according to People.

Losing the weight and getting to this slim new physique was due largely to a strict diet and exercise regimen and the help of diet program Jenny Craig, who Carey is now a spokesperson for.

Another Jenny Craig spokesperson explained to People magazine how Carey used the program to lose weight:

Once she'd shed the water weight, Carey embarked on the Jenny diet plan (formerly Jenny Craig), for which she now serves as a spokeswoman.

"The first week, I lost 40 lbs ... of just water," Carey says. "It was just water, initially. When I started with the program, I lost at least 30 lbs. of weight that needed to be lost."

And, says Carey, it wasn't all about appearance. Carrying so much extra weight made everyday tasks, including going to the bathroom, a challenge.

"I had a really tough pregnancy," she says. "I was supposed to be on bed rest, but it was so bad that even bed hurt. ... I learned a lot being pregnant, watching my body change."

She adds, "The whole point of this is not just like: 'Oh, hey, look at me and my weight loss, I'm fantastic.' It's really health. Like I said, I learned it when I became helpless and felt so vulnerable like never before in my life."

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