Mary-Kate Olsen Slips On the Street Style Shoe of the Moment

There's no denying the cozy allure of Gucci's fur-lined slipper, a shoe that's been spotted on countless street style stars at the shows and on A-listers such as Sienna Miller and A$AP Rocky. The Alessandro Michele-designed shoe is essentially a high-fashion reinterpretation of the reliable moccasin, and yesterday, as blisteringly cold winds swept the East Coast, Mary-Kate Olsen proved just how utilitarian it can be off the runway. Despite the frigid temperatures, Olsen was able to step out in N...