David Yurman'sannual rooftop summer soiree is a staple on the style set's socialcalendar and this year the easy, breezy "Sunset over the Hudson" partyhad it all: Vogue editors, a Gossip Girl star, sexy DJ Coleman,champagne and bijoux. Spotted on Yurman's TriBeCa rooftop (which wastricked up with a huge ad featuring Kate Moss and boxes of jewels andaccessories on display): Evan Yurman, Susan Shin, Vogue's VirginiaSmith, Michael Murphy, Bonnie Morrison, GG mom Kelly Rutheford, ChrisChambers, Emma Snowdon-Jones, GQ's Jim Moore, TV star KimberlyGuilfoyle, Lydia Fenet, stylist PJ Pasqual, Lynn Yaeger, ChristopherCampbell, Karen Larain, Shauna Brooks, model Irina Shayk, Ryan Brownand photographer Jeremy Kost who snapped me with his ever-present Polaroid camera. "Don't throw awayyour Polaroid cameras," Kost advised me. "They're coming back soon in abig way." Flash!