Last I checked, OP is not taking any math classes. Or applying to college.
Answering the OP: while a career in the arts will not require any math past calculus, it seems the student enjoys math. If she wants to take math, she can take math. Which math will make zero difference to admissions, so she can take what she likes. Taking schools that admit by auditions out of the equation, the rest will look that the schedule in total to assess rigor. They are very unlikely to microanalyze course by course.