9. Adriana Lima 

Having two kids hasn't stopped model Adriana Lima from dropping jaws in her beach-ready wear. The Victoria's Secret model gave birth in September 2012 and was ready to strut the runway just weeks later for the Victoria's Secret Fashion Show. 

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When she hit St. Bart's in May 2013, her itty-bitty green bikini left little to the imagination, setting off a flurry of “bikini shot of the day” blog posts. Lima credits hours (upon hours) of intense daily cardio exercise for her ability to bounce back after baby number 2. Her trainer-led sessions include jump rope, boxing and sculpting moves. Her diet, meanwhile, is heavy on steamed veggies and light on sodium and sugar.