There must be a gene that makes certain pregnant celebrities want to be photographed nude for magazine covers. Christina Aguilera, however, is unique in that she can look trampy even while pregnant. Not a trace of class on this Marie Claire cover! And even less inside, which you can see after the jump.
Demi Moore still did it best in my opinion:
Britney Spears not so much:
If there were such thing as a pregnant trannie hooker, it would be:
(Image Source via Sticky, link NSFW)