Stars Show Off Their Bikini Bumps!

Kristin Cavallari flaunts her bump in a two-piece, Jaime King shares her swimsuit-wearing rules and more moms-to-be who look just swell for summer

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.