It seems like every time Bar Refaeli's in a bikini, she has to share it with the world. On Dec. 3, the model posted a black and white photo of herself topless on Twitter with the caption, "Watch your ... more 
It seems like every time Bar Refaeli's in a bikini, she has to share it with the world. On Dec. 3, the model posted a black and white photo of herself topless on Twitter with the caption, "Watch your back!" less 
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Good Morning America | Photo By BarRefaeli/Twitter
Tue, Dec 4, 2012 10:24 AM EST