Watch: Fashion's Favorite PR Girl Talks Twitter For TED

Are you aware that a world once existed without Twitter? It's okay, you're not alone. But Aliza Licht, senior VP of communications at Donna Karan International -- and woman behind the illustrious DKNY PR Girl -- does remember that bygone era. She's witnessed the evolution of major brands on social media and, in large part, has orchestrated and guided many of those changes, as one of the industry's prime examples of PR that people actually care about. So naturally, she's the ideal candidate to gi...