Stars Show Off Their Bikini Bumps!

From Ali Larter to Kourtney Kardashian and Kelly Rowland, see which moms-to-be look just swell in swimwear

JESSICA SIMPSON

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