I think he gets the votes from some of the older people that are not into country or rock. And that could be a large base. Add to that the votefortheworst site and he could be hard to beat. I bet the people at votefortheworst are haveing aball right about now! lol I like it!
I just went to votefortheworst.com, and at the bottom of the page it has a visitor count. So far only 34000 or so visitors have been to the site. There is no way that small number of people can swing such a huge vote. Maybe there really just are some people who either feel sorry for him or genuinely think he's good.