Stars Show Off Their Bikini Bumps!

Jaime King shares her swimsuit-wearing rules, Leah Jenner #loves pregnancy and more moms-to-be who look just swell in swimwear

JESSICA SIMPSON

Oh, mama! While vacationing with her family in Hawaii, the designer snapped this sexy shot of her growing belly. "Bumpin' and proud!" the mom (she welcomed son Ace on June 30, 2013) wrote on Twitter after posting the photo in December 2012.