Just when you thought you couldn't take another morning deciding what to wear to work in this heat, Olivia Palermo rocks up to the Giambattista Valli show in all-striped everything and your fashion prayers are answered. Where top-to-toe stripes would usually be too much, OP makes it happen by playing with fresh widths — note the deck chair verticals! The wide-leg pant and loose shirt mean a breezy fit without compromising on style, and the rolled-up sleeves give ultimate French-chic vibes. Just add a simple black sandal and you've got your wardrobe working in a heatwave. No sweat.