Country crooner Kenny Chesney once wrote a song about how Renée Zellweger "had him at hello." Well, after just four months of marriage, the couple has decided to say their goodbyes. These two, who dated for a few months and then tied the knot in a quickie wedding on the beach, have announced that they will be annulling their marriage. The actress filed the papers, citing "fraud" as the reason for the split. We know things move at a quicker pace in Hollywood, but c'mon ‑- were things really that bad on the Zellweger-Chesney home front? Apparently so. For two consenting, seemingly sane adults, this seems like an awfully short period of time to give this marriage thing a shot. So we can't help but wonder: How long should a married couple wait before deciding that they just can't make it work? You tell us.