Surprise celebrity wedding

I heard on the radio on my way home from work that Renee Zellweger and Kenny Chesney got married. How weird is that? I always think it's weird when people date for a long period of time and don't get married, but meet someone and run off and get married after a short period of time. Here, they have only known each other four months. I just read yesterday that they were dating at all and Us Weekly made it sound like even though they have known each other for four months, they were only dating for a week. That's a cute picture attached to the article, though.