has lost 70lbs since the birth of her twin babies Moroccan and Monroe six months ago.
The 'We Belong Together' hitmaker admits while she was worried she would never be the same again following the pregnancy, she has managed to lose a significant amount of weight through the Jenny Craig diet
She said: "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.
"One day I was doing my thank-yous 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. When I started with the programme, I lost at least 30 lbs of weight that needs to be lost."
The 42-year-old singer - who is married to TV presenter Nick Cannon
- struggled throughout her pregnancy
and even had trouble when she was confined to her bed.
Speaking on 'The Rosie Show', she explained: "I had a really tough pregnancy. I was supposed to be on bed rest, but it was so bad then even bed hurt. I learned a lot being pregnant, watching my body change."