Bikini day looks: Stars such as Kristin Cavallari and Melissa Gorga worked hard

National Bikini Day is a national holiday that fell on Wednesday. And stars worked hard to compete on Instagram for the big day, starting early in the morning and finishing after midnight.

Stars In White Bikinis & Swimsuits: Pics Of Karrueche & More

Kristin Cavallari in Bathing Suit is Leaving it All Behind Me

Stars In White Bikinis & Swimsuits: Pics Of Karrueche & More

Here's what happened to these famous reality TV stars including

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Kristin Cavallari's Instagram, Twitter & Facebook on IDCrawl

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Kristin Cavallari in Little Black Dress is All Dressed Up

Kristin Cavallari in Little Black Dress is All Dressed Up

We Work Hard. We Play Hard. We're aggressive in happiness, in

Kristin Cavallari's Instagram, Twitter & Facebook on IDCrawl

Stars In White Bikinis & Swimsuits: Pics Of Karrueche & More