A singer is a person who sings. Anyone who is singing is a singer. Some people do it as a job (professional singer), others may sing without being paid (amateur singer). Singers may sing anything: songs, opera etc. They may be accompanied by an instrument or an orchestra. Some singers also play a musical instrument such as piano, guitar or harp while they sing (they accompany themselves). Singing is important in movies and in the theatre. A good singer will have to think of a lot of different things in a performance. Good vocal technique, a large vocal range, as well as feeling the song through emotional language and breathing, and also acting to provide a song with meaning. A good singer may be able to learn a song quickly, but it may take some time before they really feel it has become "part of them". A lead singer has to be a strong singer since other vocalists must sing accordingly.