7. Rihanna 

Rihanna seems to come from the “If you've got it, flaunt it” camp, and that's just fine by most. The Instagram junkie is known to upload selfies frequently, showing off her trim physique in a variety of skimpy swimwear. 

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The Barbadian beauty looks perfectly at home lounging poolside and oceanside, giving the paparazzi plenty of opportunities to snap pics of her decked out in next to nothing. Credit good genes and a regular exercise program with keeping Rihanna fit and ready to make waves by the beach.