Benji Madden shopping on the Lower East Side ... Brooke Shields filming a scene for Lipstick Jungle at Chelsea Piers ... Suri Cruise going shoe shopping with mom Katie Holmes ... Ben Stiller filming a scene outside the Natural History Museum ... Penn Badgley taking a break from filming Gossip Girl on the Columbia campus ... Rumer Willis showing up to a screening of House Bunny at the Hearst building ... Billy Bob Thornton performing at the Highline Ballroom ... and Michelle Williams and Spike Jonze leaving a Brooklyn bar together.