Malin Akerman, Hannah Simone, Peter Facinelli, and others attend a poolside soiree on the The London roof celebrating the Zooey Deschanel for Tommy Hilfiger Collection; Kaley Cuoco, Chris Klein, and costars hit the red carpet premiere of Authors Anonymous; Rachel Zoe sign copies of her new book at Marc Jacobs—take a peek inside Wednesday's top L.A. events in this edition of Last Night's Parties.