Gigi Hadid has a long night of sky-high stilettos ahead of her at the 2026 Met Gala . So she's wearing Miu Miu ballet flats for as long as possible on the first Monday in May, before it's time to slip into her red carpet dress. Knowing Hadid, she won't ditch the Mary Janes until the minute her sprinter van's doors open. Minutes before Hadid found her seat in the makeup chair (where she'll presumably stay for the next few hours), paparazzi spotted her outside the Carlyle Hotel in an off-duty outfit. For Hadid, four-figure Miu Miu flats are considered casual, even the tricky-to-track-down, satin Mary Janes. If their contrasting elastic straps, round toe boxes, and slipper-esque soles seem familiar, that's because Olivia Rodrigo just wore a baby-pink pair to host and perform on Saturday Night Live . The cult-collected shoes also joined Rodrigo on-stage during an American Express concert last October, except the satin was the same olive shade of green as Hadid's.…