A singer, or vocalist, is paid to sing songs, either in public or in private. If life were musical theater, everyone from the butcher and the baker to the postal worker and the policeman would spontaneously break out into song, musing melodiously on the mundane details of everyday living. Because life isn’t a musical, though, the only people who spend their days singing are professional singers. When you’re a singer who’s paid to sing in public, you sing for live audiences at nightclubs, concert venues, theaters, and stadiums. In private, on the other hand, you may sing in studios for recordings and soundtracks.