Artists who participate in these arts in front of an audience are called performers, including actors, comedians, dancers, musicians, and singers. Performing arts are also supported by workers in related fields, such as songwriting and stagecraft. Performers often adapt their appearance, such as with costumes and stage makeup, etc. There is also a specialized form of fine art in which the artists "perform" their work live to an audience. This is called Performance art. Most performance art also involves some form of plastic art, perhaps in the creation of props. Dance was often referred to as a "plastic art" during the Modern dance era.