Small and Smaller

Rumor has it that Christina Aguilera and Nicole Ritchie are both pregnant - not that there's anything wrong with it, of course. It's just that both ladies are the size of a third-grader and I cannot fathom how they will actually carry a baby. It's a question of physics: in the same way I wonder how Dolly Parton and other generously endowed ladies don't topple over from being top-heavy, I am perplexed about how someone who's a size 0 can find room inside for another snack, let alone a full-term baby. Is there actually any space in there?