May 15, 2011 - Stephen Lovekin/Getty Images North America more pics like this »
Tina Fey

Tina Fey managed to keep her second pregnancy under wraps for 5 months before she spilled the beans on Oprah. Fey explained in her book Bossypants that for a long time, she was uncertain when she'd have her second child: "My husband and I decided that, rather than risk having [30 Rock] end in several years and feeling like part of our family was missing, that we were going to prioritize a family."