Mariah Carey, Nick Cannon debut twins on '20/20'

Mariah Carey and Nick Cannon introduced the world to twins Monroe and Moroccan on Friday during a 20/20 interview with Barbara Walters.

The segment gave fans a first-time look at Dem Babies (a nickname bestowed by mom and dad) and details on Mariahs difficult pregnancy.

The 6-month olds, known as Roc and Roe, were dressed in their Sunday best for the big reveal. During Barbaras nursery visit she even got to hold little Roc, while proud mama Mariah sang We Belong Together.

Bringing the babes into the world was no small feat. Mariah told Barbara she did have fertility treatments, including progesterone before and during her pregnancy to reduce the chance of another miscarriage.

Once she conceived, the risks increased. I dont think I understood the enormity and the magnitude of what it really does to your body, Carey said. Carrying two babies. Unless somebodys been through it, its difficult to understand what I went through, because my pregnancy was very unique in terms of what happened to me.

What happened? Carey suffered from gestational diabetes and was at risk for seizures. She was also on bed rest, experienced false labor pains and made multiple trips to the hospital.

The babies were born at 35 weeks on the couples third wedding anniversary, April 30, to the live version of Mariahs hit song Fantasy. Nick played delivery room deejay during his wifes C section. I wanted them to hear the applause, Carey confessed.

Now, the May-December couple couldnt be happier.

My family gives me everything, Cannon confessed. Unconditional love means the world to me. I mean, its comp! letion.< /p>

Its just love, Carey added. Its a beautiful place to be.

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Mariah Carey and Nick Cannon's twins are born: Hello, #dembabies!

-- Emily Christianson

Photo: From left: Barbara Walters, Mariah Carey, Monroe, Moroccan and Nick Cannon. Credit: ABC News.