Christina Aguilera shows off her pregnant belly (among other things) on the cover of the January issue of Marie Claire.

The bad-girl singer tells the mag that she wasn't deliberately being coy by not announcing her pregnancy sooner.

" It wasn't a "big, bad secret…I just wasn't commenting. I'm not being like, 'Hey, everybody, I'm pregnant!' I'm not that girl," Xtina insists.

She also claims that she and hubby Jordan Bratman have "power" eggs and "super" sperm. Apparently, she got pregnant the minute she went off the pill while he was visiting her on tour.