Das Land des Lächelns
Losseff was the stage, screen and life partner of the Austrian tenor Richard Tauber from 1929 to the mid-1930s, and Tauber's close friend until his death in 1948. She was the muse for his 1934 operetta "Der singende Traum" and his three songs titled "An eine schöne Frau", and she also starred opposite him in numerous productions. She made commercial recordings of one solo ("Peter, Peter") and several duets with Tauber. She co-starred in four films: "The Land of Smiles" (1930), "Liebeskommando" (1931), "Bretter, die die Welt bedeuten" (1935) and "The Sky’s the Limit" (1938). Her voice was a high, light and sweet soprano – not big or great, but charming, true and technically assured.