Damon Vincenti, a young vineyard worker, has a beautiful tenor voice and dreams of becoming a great opera singer. He debuts at Lardelli's Italian restaurant in San Francisco, where he is spotted by Kendall Hale, a society girl who enjoys launching young artists while making them her lovers before dumping them after use. Damon is no exception to the rule: he becomes famous but Kendall leaves him abruptly. He feels so affected that he must give up singing. In Mexico, where he has got back in touch with his inner self, Damon meets Juana Montès.They are happy and get married. But Kendall is still around... 

Golden-throated Mario Lanza stars in Because You're Mine. Lanza plays opera singer Renaldo Rossano, who is drafted into the army. Much to the displeasure of topkick Sgt. Batterson (James Whitmore), Renaldo is given celebrity treatment even while in uniform. Even more problematic is the romance between Renaldo and Batterson's sister, Bridget .... 

Enrico Caruso's (Mario Lanza) only passion is to sing. For that, he leaves his hometown of Naples, Italy, and travels to America to sing for the Metropolitan Opera. At first his lack of education and poor background make him an outcast in the high-class opera world. Eventually, his amazing voice wins him both fans and the hand of his love, Dorothy (Ann Blyth). But his nonstop pace and desire to perform at any cost eventually take their toll on the singer's health.

Karl is in love - with a barmaid! The ways of the heart clash with the mandates of state-arranged marriage in this regal Hollywood adaptation of the operetta by Sigmund Romberg, the composer whose life was the subject of the biopic Deep in My Heart. Edmund Purdom, lip-synching the rich singing of tenor Mario Lanza, portrays the on-screen Karl and Ann Blyth, who starred opposite Lanza in The Great Caruso, is the Heidelberg sweetheart the prince meets during what is supposed to be a final revelry before his royal wedding. Hermes Pan, choreographer of many Astaire-Rogers classics, brings Oktoberfest joy to the staging of several numbers. 

On a train to Rome, the American singer Marc Revere meets the Italian Raffaela. He notices that she intends to work and live at her uncle's. When he gives her a ride, it turns out that said uncle has moved to South America. So Revere offers her to live with him at his cousin's, an impecunious pianist. 

 The brilliance of one of the world's most beloved tenors and the exciting world of opera highlight this delightful romantic adventure set in the most beautiful cities of Europe. Tonio Costa (Mario Lanza), the temperamental darling of the opera world, is forever missing performances because of impromptu street concerts and endless parties. But Tonio's carefree ways change when he falls in love with Christa, a beautiful deaf girl. Christa refuses to marry him until she can hear his sublime voice. So they embark upon a whirlwind concert tour of Europe where Christa consults with specialists while Tonio sings his heart out. Their love grows stronger and they realize that as long as they are together they can face whatever the future holds. Lush, exotic locations, fabulous operatic performances and the magic of Mario Lanza give this sparkling love story the look and sound of enchantment. 

When Prudence Budell (Kathryn Grayson) returns from musical training, her grandmother, Abigail (Ethel Barrymore), hires Jose Iturbi (Jose Iturbi) to start her own opera company, in which Prudence stars. The company hits a snag when Prudence refuses to sing with the star tenor. 

An opera diva's (Kathryn Grayson) manager (David Niven) cultivates a singing bayou fisherman (Mario Lanza) suddenly in love.