Even though this question is asked often, it is still one of my favorites. The best part about it is that only you can answer that question.
Being good at math is great. Does that mean you understand the concept of money and would be interested in a Finance degree and possibly a job in accounting? What kind of background do you have, educationally speaking? The performing arts are a great passion that many people have but sadly, you have to be within the top 10% of the world to really do something about it to earn a solid wage worth living off of.
I highly suggest you make a pros and cons list and evaluate what you are willing to put into a career and what skills and trades you have to offer. Again, only you can decide what would be best for you. Doing a personal evaluation (introspection) is a great way to really figure yourself out and decide what you really have and what you want out of life.