Mariah Carey is sporting a brand new body after dropping a whopping 70 pounds after pregnancy!

That’s like one Olson twin!

So how did Mariah do it? According to her, losing water weight and sticking to a strict Jenny Craig diet.

Oh, that’s right Mariah is also the new face of Jenny Craig, which is now just called Jenny.

It’s like the ‘Cher’ of diet plans.

Anyways, the 42-year-old singer, who gave birth to her twins Moroccan and Monroe back in April, said that getting rid of water weight is what got her on track to lose even more weight.

“In the beginning, when I first had the babies, I had so much edema … water and swelling. Most pregnant women have that just in their feet,” Carey said. “One day I was doing my thank-you notes and I noticed it started rising up the leg, so I had edema. … I didn’t think I would ever be the same person.

“The first week, I lost 40 lbs. … of just water — it was just water, initially.”

Carey revealed that once she started with the Jenny Craig program, she then “lost at least 30 pounds of weight that needed to be lost.”

Starting in July, Carey kept to her strict 1,500 calorie-a-day menu and worked out 3 times a week.

“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,” she adds.

Good for you Mariah, keep it up!