NEW YORK, NY - DECEMBER 07:  Gigi Hadid leads a Self Defense Workout at Reebok And Gigi Hadid Present #PerfectNever Revolution, celebrating the next stage of the brand's #PerfectNever message which inspires women to challenge the notion of perfection as part of its Be More Human campaign on December 7, 2016 at Skylight at Clarkson Square in New York City.  (Photo by Jason Kempin/Getty Images for Reebok)