An update for the denim-obsessed: here are three cool ways to wear it now. Olivia Palermo has updated her skinnies with strategically placed rips and a statement sweatshirt. Keira Knightley, meanwhile, is firmly in the on the too-cool camp, with her loose dungaree turn-ups. Selena Gomez, ever the California style queen, kills it in an indigo onesie.