A vocal quartet is a musical group consisting of four singers who perform together. This ensemble can include various voice types, such as soprano, alto, tenor, and bass, allowing for rich harmonies and diverse musical arrangements. Vocal quartets can perform a wide range of genres, including classical, jazz, and pop. These groups often focus on a cappella singing, meaning they perform without instrumental accompaniment. Famous examples of vocal quartets include The Four Seasons and The King's Singers. They may also participate in competitions or festivals, showcasing their vocal skills and creativity in arrangements.