Alyson Hannigan grew up in Hollywood. And Hollywood has grown up with her. The gentle, always smiling actress made her commercial debut as a child, starred in "Buffy The Vampire Slayer" and then shot to true stardom as the awkward, flute-loving prom date to Jason Biggs' pie-loving character in the first "American Pie" film. Each subsequent sequel of the dessert defiling series brought the awkward crew to a new stage in their lives, from high school to college to, in 2003, marriage. It's become...