This week, beauty editor Priya Rao sits down with Katia Beauchamp, CEO and co-founder of Birchbox, the company that sends monthly packages with a few samples of beauty products -- after that, it's up to the user to determine whether they want to take their relationship with this or that swatch of makeup to the next level. Katia discusses establishing Birchbox's appeal to the everyday beauty consumer, its recent partnership with Walgreens, and its plans for international expansion.