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World's richest billionaires

Published On: Mar 08 2012 09:56:15 AM CST   Updated On: Mar 03 2014 09:32:55 AM CST

A familiar face takes over the top spot on Forbes' list of the world's richest billionaires.

Christy Walton
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9. Christy Walton & Family -- The WalMart heiress is the world's richest woman, worth an estimated $36.7 billion.

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