Hi Launter
I really like Andreas Bocelli, but having said that I don't think I could study with him.
I am job hunting at the moment and, if I need to concentrate I will listen to more orchesteral music. I find piano music quite good, but I also listen to Aker Bilk as well.
I just find that if I am listening to songs it needs some concentration, which I need for my work.
Any easy listening music which you can have in the background, to relax. I agree with Krummhorn, nothing too heavy.
I do listen to Bocelli, Russell Watson and Pavarotti, but that's when I have finished and don't have to concentrate on anything else.
Anyway good luck with your studies, whatever you listen to.
Margaret