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Stars and Their Pets: The JoBros' Third WheelKevin joins Joe and Winston on a walk in L.A. Plus: Holly Madison pals around with a penguin in Las Vegas and more
Updated: Wednesday May 11, 2011 | 06:00 AM EDT
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After playing with a dog earlier in the day, Prince William's best man climbs aboard a horse Saturday for a polo match at Coworth Park in Berkshire, England.
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