From Buffy to American Pie to How I Met Your Mother, Alyson Hannigan has long played the part of a funny, loyal friend. It's a role she's happy to take on in real life, too, as the face of Head & Shoulders' new e-manual, The Good Girlfriend Guide. While celebrating the launch of the guide, Alyson opened up about her style, her adorable daughter, Satyana, and the real stories behind some of her most popular characters. Read on for more.
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