The University of Denver.
www.du.edu
has what's called a "3/2 integrated music/business program" where you can combine an undergraduate music degree with an MBA, IMBA or MAcc in 5years. Their music school is quite good.
It's absolutely what I would have done if I did it again.
http://www.daniels.du.edu/undergrad_grad_faqs.aspx
I'm glad I have a music degree, but an MBA for one more year of school would have been a good move.