A field holler, also known as a work song, is a type of song that was originally sung by slaves in the Southern United States to accompany their work in the fields. These songs are characterized by a call-and-response style and often included improvised lyrics and melodies. Synonyms for field holler include plantation song, work chant, and sung spiritual. Other related terms include hollerin', which refers to a form of American folk music that features solo vocalists using a technique called overtone singing, and blues, which developed from the African American work songs and spirituals of the Deep South.