@talk72000,
Deanna Durbin was indeed a major star in the 1940s. She originally signed with MGM, but that studio wasn't big enough for both her and Judy Garland, so Durbin went to Universal, where her breakout hit came in 1936 with
Three Smart Girls. Not only did she have a swell voice, but she displayed a kind of adolescent moxie that the sweet, virginal Garland lacked. Here she sings the "Miserere" from
Il Trovatore in the 1947 film
Something in the Wind with Metropolitan Opera tenor Jan Peerce:
She eventually got fed up with the movie business and, when her contract with Universal ran out in 1948, she not only walked out on the studio, she quit movies entirely. She's living in Switzerland right now, where she shuns any interviews or any offers for a comeback.