AnnaSophia Robb has some chic shoes to fill as the star of CW teen drama "The Carrie Diaries." In the much-anticipated "Sex and the City" prequel, Robb plays the high school version of Carrie Bradshaw, the character who made Manolo Blahnik a household name and whose wardrobe was practically its own character. So it's no wonder H&M tapped the style-savvy 19-year-old to host the launch of its "Denim Days" campaign Saturday. We caught up with Robb at the store's New York flagship to talk beauty secrets, fashion regrets and the most awkward "Carrie Diaries" scene to film thus far.