Looks like Mischa traded in Cisco for her smaller, furrier companion this week when she was spied at the Miami airport. We're sure Cisco doesn't mind her traveling with her dog, but he might be a little upset when he hears the latest rumor that his girl has been hooking up with a costar on her new film behind his back. Here's more: Mischa Barton (r.) has kept her fans guessing with her Read more