Music's honorific nicknames

Who is the Queen of Soul? What about the Queen of Rap? Do you know what legends like Marvin Gaye, Dolly Parton, and Christina Aguilera are referred to as in the music biz? And did you know that there are two extremely successful female musicians with the title Queen of Pop? Who is your pick? Click through this gallery to learn more about music's designated monikers and see if you agree.