Who said that a singer needs a backup band? Popular music…

https://www.musical-u.com/learn/acappella-train-left-station-board/
Who said that a singer needs a backup band? Popular music has shown that a cappella singing is a great way to express your musicality. Musical U has compiled 5 cool YouTube videos by a cappella singers 🎤https://www.musical-u.com/learn/acappella-train-left-station-board/