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See how Reese Witherspoon, Halle Berry, Rihanna and more are heating up the sand in their sexiest swimwear!
Updated: Wednesday Aug 24, 2011 | 06:00 AM EDT
By: Christie LaRusso
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In addition to her pre-party push-ups, Whitney fits in her fitness while vacationing in Miami Beach by taking a calorie-burning ocean dip.
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