6 Must-Haves for Fashion's "It" Girl Alexa Chung

Alexa Chung shares secret to cutting-edge style with wisdom and wit in new book "It."
3:00 | 12/04/13

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Transcript for 6 Must-Haves for Fashion's "It" Girl Alexa Chung
First, don't get to be a tv personality, model, style icon, like alexa chung, without learning a thing or two along the way. I mean, what she does. Alexa's taken what she has learned and sharing it in a new book. It's called "it." And rachel smith is giving us a sampling. Reporter: She's a british model turned 21st century it girl. A phenomenon, according to "vogue" magazine's editor in chief, anna wintour. Now, she's sharing what it takes to have what she has, in a new book called "it." The it girl term. And I like that it's finite. It's such a broad spectrum of ideas. Reporter: I look at it as maybe an inspiration board? Yes. It's like one, long pinterest or instagram account. It's what I do for inspiration. Reporter: To show me where she finds inspiration, she invited me to 10 foot single in brooklyn, new york. They say it's effortless or whatever. And they don't realize I spent two hours washing it, and drying it and making it look messy. Reporter: Within off her favorite pop culture references, the spice girls. They look like they're having so much fun. And there weren't any rules when it came to getting dressed. To me, it's about expressing yourself and convey your frustrations and things you like through how you dress. We could be in the spice girls. This is it. Missing our pigtails. Say ah. Reporter: Our alexa must-have, valley flats, ankle boots, a white shirt, a boyfriend sweater. A canvas tote. And a trench coat. The rolling stones with that. What would you pair it with? Black jeans. It's so itchy. I'm willing to do it, though. Reporter: Is that a winner? I think we have a winner, everyone. Reporter: Yes. And a newfound passion for fashion. For "good morning america," rachel smith, abc news, brooklyn. Got that? And boots. Alexa chung's book, "it," is available right now.

This transcript has been automatically generated and may not be 100% accurate.

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