Most moms-to-be choose to keep their pregnancies a secret for at least a few weeks -- if not a whole trimester. But the more famous you are, the harder that secret is to keep! Take Mariah Carey, whose weight gain earlier this year prompted major speculation that she might be pregnant. After months of denials and evasions, the singer was forced to admit that she and husband Nick Cannon are expecting. So much for keeping it in the family!