Mariah Carey shows off her (great) 'Shape'

By Ann Oldenburg, USA TODAY

Posted April 18, 2012

Mariah Carey's twins, Roc and Roe, will turn 1 on April 30. The singer is celebrating by showing off her 70-pound weight loss on the May cover of Shape.

"Pregnancy was probably the best and the hardest thing I'll ever go through," she says. "I know for a lot of women, it can be wonderful and relatively easy. But for me, it was like 'Okay, honey, do you have to do everything the hard way?' "

Carey lost 40 pounds right after the babies were born. The Jenny Craig endorser has lost another 30 while on the Jenny program, which she started in July.

She says the structured Jenny eating plan, along with a workout routine, have helped her lose the weight and stay toned. "I used to be able to slim down just by exercising more, but that's changed. Since having the babies, I realize that 90 percent of losing weight is my diet," she tells Shape.