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OTRC: Nick Cannon talks about Mariah Carey's workout goal for post-baby body

Mariah Carey, Barbara Walters, Nick Cannon and Moroccan and Monroe appear in a still from '20/20.' (ABC / Donna Svennevik)

Nick Cannon and his wife Mariah Carey recently showed off their twins Moroccan and Monroe to the world for the first time last week on "20/20." Cannon says that his wife is working hard on "getting in shape" after giving birth to the babies in April.

"You saw how good she looked on [the 20/20 special]!" Cannon, 31, told Us Weekly recently. "We filmed that a while ago, too."

"I personally think she's going to come out looking better -- looking like it's 1990!" he added. "I think that's what she's aiming for, and I think she'll reach that goal."

Carey herself has Tweeted about her attempts to work off the baby weight. In August she posted a photo of herself on Twitter in a bathing suit saying, "Ocean work out! It's been a loooong time since I've been in the ocean."

The Grammy-winning singer said she has also been taking long walks with her five Jack Russell terriers named Cha Cha, Jackie Lambchops, Jill E. Beans, Squeak E. Beans and JJ.

Carey, 41, and her husband Nick Cannon welcomed their twins Moroccan and Monroe on April 30 via Caesarean section. The date also marked the couple's second wedding anniversary.

Carey and Cannon sat down with Barbara Walters to introduce the tots in an interview that aired on October 21 and to discuss their struggles conceiving, the singer's high-risk pregnancy, parenthood and their marriage.

The singer said her body endured a lot of stress from the pregnancy. "I don't think I understood the enormity or the magnitude of what it really does to your body," Carey said in the interview. "Like it's not just, oh you don't look pretty and you have a bump."

The couple recently started a website called dembabies.com, where fans can see candid photos of the six-month-old twins and their celebrity parents.

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