West Coast PYTs proved last week that there is more to teen fashion than Juicy and Abercrombie. At Teen Vogue’s Young Hollywood party at Chateau Marmont, the looks ranged from vintage vixen to punk rock princess to Grecian goddess, accessorized with handsome young men. (There were a few older guys in the crowd, too, including Bruce Weber, Mario Testino and Matt Dillon.) But a few ladies came with their equally stylish moms: Gia Coppola and Jacqui Getty, Dakota Johnson and Melanie Griffith, and Sonja and Nastassja Kinski. Whomever the chaperone, there seemed to be so many underage girls being served that even 21-year-old Kate Bosworth was shocked. “Are they even checking IDs here?” she asked.