Moms-to-Be Who've Dared to Bare!

From Doutzen Kroes and Shakira to Jessica Simpson and Demi Moore, see which stars have stripped down to belly basics

CHRISTINA AGUILERA

Though the pop singer never officially announced her pregnancy, she made it proud and clear on the January 2008 cover of Marie Claire. "[People] thought I was trying to keep it this big, bad secret, and that's not the case at all," said Aguilera. "I just wasn't commenting. I'm not being like, 'Hey, everybody, I'm pregnant!' I'm not that girl."