Last night’s social calendar was all about the dueling 10-year anniversary parties for Opening Ceremony and Y-3, and it seems a few other designers showing Sunday were also casting a long(ish) glance back. Tommy Hilfiger did–what else–preppy standards. Zac Posen went on a super nostalgia trip with some big name models. Diane Von Furstenberg, sporting Google glasses, set her sights on her Bavarian princesshood. Thakoon looked back downtown. But when it comes to really getting the fash pack’s tongues wagging, hot on the heels of her Olympics Spice Girls reunion, Victoria Beckham did the once unthinkable for Posh, sending her models out in Manolo Blahnik gladiator flats.