Mariah Carey Reveals Weight Loss Secrets, Shows Off Slimmed Down Post-Baby Body

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We already got a peek at her ridiculously taut tummy, and now Mariah Carey is spilling the beans on how she lost a whopping 70 pounds just 6 months after giving birth to twins Moroccan and Monroe Cannon.

Mariah appeared on Tuesday's episode of The Rosie Show on OWN, and the 42-year-old singer revealed that her new physique is the result of a strict diet and exercise routine.

"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," Mariah told Rosie. "I didn't think I would ever be the same person." After the twins were born, Mariah went on the Jenny diet plan (formerly Jenny Craig), and she is thrilled with the results. "The first week, I lost 40 lbs. of just water," she said. "It was just water, initially. When I started with the program, I lost at least 30 lbs. of weight that needed to be lost."

"I never weighed myself," she explains. "People will think I'm a liar but it's true. This is another cliché phrase, I'm a big boned girl … I'm tall and so I always weigh more. I would tend to go, 'Does this size dress fit me that I wore three years ago? I'm good, let's go.' I would go by what it looked like, how I felt."

In case you missed the video of Mariah's new bod, click thru to see it again!