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Christina Applegate: The young Emmy-nominated "Samantha Who?" star, whose mother is also a breast cancer survivor, underwent a double mastectomy this summer after learning of her diagnosis. Since then, the tireless Applegate, 36, has not only returned to work, but she also has... more thrown her energies into founding the Web site www.rightactionforwomen.org, which focuses on MRI detection for those at particular risk of contracting the disease. "Sometimes these things get thrown at you for a reason," she said on the red carpet at the Emmys, "and my reason is to put a voice to it." Let's take a moment to say thank you.