'' Naughty Marietta '' ( 1935 ) , directed by W. S. Van Dyke , was MacDonald 's first film in which she teamed with newcomer baritone Nelson Eddy . Victor Herbert 's 1910 score , with songs like " Ah ! Sweet Mystery of Life " , " I 'm Falling in Love with Someone " , " ' Neath the Southern Moon " , " Tramp , Tramp , Tramp " , and " Italian Street Song " , enjoyed renewed popularity . The film won an Oscar for sound recording and received an Oscar nomination for Best Picture . It was voted one of the Ten Best Pictures of 1935 by the New York film critics , was awarded the '' Photoplay '' Gold Medal Award as Best Picture of 1935 ( beating out '' Mutiny on the Bounty '' , which won the Oscar ) , and in 2004 , was selected to the National Film Registry . MacDonald earned gold records for " Ah ! Sweet Mystery of Life " and " Italian Street Song " . The following year , MacDonald starred in two of the highest-grossing films of that year . In '' Rose-Marie '' ( 1936 ) , MacDonald played a haughty opera diva who learns her young brother ( pre-famed James Stewart ) has killed a Mountie and is hiding in the northern woods ; Eddy is the Mountie sent to capture him . Nelson Eddy and she sang Rudolf Friml 's " Indian Love Call " to each other in the Canadian wilderness ( actually filmed at Lake Tahoe ) . Eddy 's definitive portrayal of the steadfast Mountie became a popular icon . When the Canadian Mounties temporarily retired their distinctive hat in 1970 , photos of Eddy in his '' Rose Marie '' uniform appeared in thousands of U.S. newspapers . '' San Francisco '' ( 1936 ) was also directed by W.S. Van Dyke . In this tale of the 1906 San Francisco earthquake , MacDonald played a hopeful opera singer opposite Clark Gable as the he-man proprietor of a Barbary Coast gambling joint , and Spencer Tracy as his boyhood chum who has become a priest and gives the moral messages
1906 San Francisco earthquake
1906 San Francisco earthquake
Jeanette MacDonald