Mariah Carey is baring all -- including her growing belly -- on the cover of Life & Style.

The pregnant 42-year-old singer strips down to nothing for this week's issue, where she opens up about having twins in an interview done the day after she was taken to the hospital with contractions.

"I was feeling very vulnerable about taking pictures at all right now, but then I didn't want to miss this opportunity to document this once-in-a-lifetime experience," says Carey. "My ultimate goal was to share this incredibly personal moment with my true fans."

Mariah, who is having a baby boy and girl, says the girl is already "a diva in training."

Husband Nick Cannon got in on the interview as well, telling the mag "I thought I couldn't love Mariah more," he tells Life & Style. "But I have a whole new appreciation and admiration for her."

From Britney Spears to Demi Moore, check out what other stars have stripped down for a magazine cover while pregnant!

The magazine is on newsstands Friday.

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