Gigi Hadid, is that you? The 22-year-old model seems to be channeling her inner Twiggy for her latest Stuart Weitzman campaign, sporting a cropped pixie cut and '60s-inspired thigh-high boots. "Gigi. Is. Back," the brand captioned a series of photos of Hadid rocking her new look on Instagram on Tuesday. Photographer Mario Testino also took to social media to share the final product of the photo shoot.