First of all, that is great that you have a solid idea of the graduate degree you'd like to get! For undergrad, degrees in History and Political Science can give you a great understanding of the government and how it has grown and developed over time. A degree in Business Administration can also give you a firm grasp on business and corporate concepts to serve them later as a lawyer. Start thinking about what type of law you would most like to practice, then hone in on the degree that would give you the best understanding of that field.
You can pick any major that you have great interest in. Law has many practice areas and a foundation in one will be helpful.
If you are still uncertain, philosophy--focusing on critical thinking and logic will help your mindframe for the LSAT.