LOVE THIS PONY AT MARC JACOB'S SPRING/SUMMER 2013 SHOW...
here's the how-to-do from Guidi Palau, Redken's Creative Consultant:
To get a voluminous, teased ponytail, Guido spritzed the hair with Redken Guts 10 Volume Spray Foam, made a deep side part, and rough-dried it. For lift at the crown, he used Redken Quick Tease at the roots. After gathering the hair into a ponytail, Guido pulled out little pieces of hair right before the show started, "so it feels like she's slept in it."