Vocal Zone is a quartet of women who sing 4-part harmony a cappella style based in Aberdeen, Scotland. 2021 is the quartet's 20th year performing together, having started the quartet in 2001. Four voices blended in harmony and singing without accompaniment, they sing a wide range of songs including jazz, soulful ballads, gospel and Scottish. Shows, concerts, corporate events, weddings or Burns Suppers, there is something in their repertoire for every occasion. The quartet is officially registered with Sweet Adelines International, a worldwide organisation of women singers based in Tulsa, Oklahoma and all four are members of the award-winning chorus: the Aberdeen Chorus of Sweet Adelines.