Listen to Norma: Casta diva online. Norma: Casta diva is an English language song and is sung by Montserrat Caballé, Carlo Felice Cillario, London Symphony Orchestra and London Symphony Chorus. Norma: Casta diva, from the album Opera's Legendary Performances, was released in the year 2016. The duration of the song is 10:19. Download English songs online from JioSaavn.