Listen to She Used to Be Mine (from Waitress) (Instrumental) online. She Used to Be Mine (from Waitress) (Instrumental) is an Instrumental language song and is sung by CurtainUp MTK. She Used to Be Mine (from Waitress) (Instrumental), from the album Contemporary Broadway Karaoke, Vol. 6 (Instrumental), was released in the year 2021. The duration of the song is 4:21. Download Instrumental songs online from JioSaavn.