I mostly agree with stinkypants. It is far, far too early to start thinking about "corporate law" at this point. His points are also very well taken regarding the challenges law students/graduates face. A law degree is no guaranteed pass to easy street - in fact, almost the opposite is true.
While I may not actually attempt to dissuade my children (or other people's children) from going to law school, I feel quite strongly that you should not plan your undergraduate studies around your law school plans (other than maintaining a good GPA, which you should be doing anyway).
Don't worry about which major is best for law school - instead worry about which major you enjoy and can do well in. More importantly, worry about how your chosen major will prepare you for life if/when you decide NOT to go to law school. English, polysci, and history are popular majors for law school (foolishly, in my opinion), but none of those provide easy alternate career paths. Science, engineering, accounting, nursing, etc. - those are studies and degrees that will do you well if you do not go to law school, and will also help you if you do. (Although a separate, perhaps somewhat amusing, subject would be why I think the engineering mindset provides a challenge during and after law school).
Bottom line - lots and lots of people think they want to be lawyers. Many are right. Many are right but fail. And many more were wrong all along, but stubbornly went anyway and paid the price.
Again, probably too early for you, but if you feel like reading I [plug] recommend "Law School: Getting In, Getting Good, Getting the Gold" by my friend Thane Messinger. It has an extensive discussion of whether to go to law school at all. [/plug]