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Rihanna over the years: 21 sexiest looks (Photos)

<div class="meta "><span class="caption-text ">Rihanna appears at Roc Nation&#39;s 2014 pre-Grammy Awards event in Beverly Hills, California on Jan. 25, 2014. (Tony DiMaio &#47; Startraksphoto.com)</span></div>
March 27, 2014 3:33:50 PM PDT