Minnillo and Lachey sizzle poolside in Salt Lake City. Plus: Hilary Duff, Mary-Kate Olsen, David Beckham and more

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REVEL WITH A CAUSE

Uma Thurman and Will Smith add to the star wattage at a 90th birthday dinner in honor of Nelson Mandela Wednesday in London. The charity event raised funds for the former South African president's global 46664 campaign against HIV/AIDS and is part of several days of celebration, including an all-star concert Friday in London.