I totally agree with ValleyGal. Don't double major (or dual major) because you think it will look good with AdCom people. Personally, I think it works against you if you double major and one of your majors is not something you feel passionate about. Remember that people who interview you has a lot of life experiences and they can see through your masks and whatnot. Double major and study something that you really like to know about. That way, you are going to be passionate about it when people start talking to you about what you study.