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Hilary Duff, Hailey Duff, Benji Madden, Joel Madden, Good Charlotte, Emmy Rossum, Cartier

Hilary Duff, left, and sister Hailey pose by the pool. Glass cases displayed this year’s crop of colorful knotted silk cord bracelets benefiting charities chosen by Hilary Duff, Good Charlotte’s Benji and Joel Madden, Emmy Rossum and this year’s other ambassadors. Over the last two years, the... Carlos Chavez / Los Angeles Times