Stars Show Off Their Bikini Bumps!

From Penélope Cruz and Jessica Simpson to Gisele Bündchen, see which moms-to-be look just swell in their swimwear

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PENÉLOPE CRUZ

Although she rarely gave a glimpse of her bump during her last pregnancy, the mom-to-be – she's expecting her second child with husband Javier Bardem – put her belly on full display in a tiny black two-piece while vacationing in Barbados on March 5.