Watch Online Free HD Solarmovies. ‘Casta Diva’ is the famous aria for soprano and men's chorus from the opera ‘Norma’ by Vincenzo Bellini and marks one of the high points of the Italian bel canto repertoire. The film tells the passionate love of a Gallican priestess for a Roman proconsul and expresses passion as a universal and timeless emotion by using abstract paintings-in-motion.