Vince Vaughn and Jennifer Aniston star in "The Break-Up," which starts where most romantic comedies end: after boy and girl have met, fallen in love, moved in to start their happily-ever-after..and right when they wind up driving each other crazy. Pushed to the breaking-up point after their latest "why can't you do this one little thing for me?" argument, art dealer Brooke (Aniston) calls it quits with her boyfriend, Gary (Vaughn), who hosts bus tours of Chicago. more