What I’m thinking about for next year:
AP English Lang
AP Econ (Macro and Micro–my school does one each semester and they’re both considered part of the same course)
AP Physics C (Both parts–again, my school does one part each semester and they’re both considered part of the same course)
AP BC Calc
AP Bio
AP Music Theory
Does it look bad to take this many AP’s? I know that a lot of colleges look down on “stacking” AP’s. But, I’m honestly interested in all of these and have been looking forward to taking them for ages. Taking music theory for my art requirement. Any thoughts?
If you can handle them, then go ahead, but I think most people wouldn’t be able to (I know for sure I couldn’t). I don’t think it looks bad that you’re taking so many, it’s more that I hope it doesn’t consume your life, especially during senior year. 
Do you have an extensive music background? If not, I would not suggest such a challenging course simply to fulfill your arts requirement.
AP Bio and AP Physics will both require a ton of time on lab work and writing lab reports. Taking these together, plus 4 other AP’s, plus writing college applications, is recommended only for students extremely capable of handling the work and who possess very strong time management skills. Otherwise, it’s a crash and burn waiting to happen.