If you want to catch Lauren and Whitney from The Hills while they're in town this week, you'd be well advised to stay in the vicinity of anything Marc Jacobs. A reader reports that the show was filming at the Marc Jacobs casting yesterday, and another source with knowledge of the show's inner workings tells us that the pair flew in to New York from L.A. on Monday, and they'll mostly be hanging out at Condé Nast and Marc Jacobs. They'll head to Las Vegas for the VMAs on Sunday, and then will, reportedly, be back. Sightings are, of course, welcome.