What type of lawyer do I need as a musician?

The type of lawyer you need depends on the matter. As a musician, if you are composing music, then you will need legal advice regarding copyright, licensing and possibly trademark. Even if you are performing other people's work, you need to understand what licenses you need to perform and what rights you have in the performance. If you are making music videos, then you need to have the proper releases/licenses.  Regardless, you should have a lawyer look over anything that purports to deal with rights, royalties, fees or other contractual matters.