Kristin Cavallari's Birthday; Reality Star Turns 25, See Her Sexiest Bikini Looks (PHOTOS)

01/05/2012 09:18 am ET | Updated Mar 06, 2012
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Forget about The Hills, Kristin Cavallari is proving to be quite the stunner all over the world. And today, Jan. 5, she celebrates her 25th birthday.

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