Beloved by Joseph Stalin, she was frequently used by him for performances at the Moscow Kremlin to impress visiting dignitaries.

Her repertoire at that opera house included Antonida in Mikhail Glinka's A Life for the Tsar, Countess Almaviva in Mozart's The Marriage of Figaro, Marguerite in Charles Gounod's Faust, Marfa in Nikolai Rimsky-Korsakov's The Tsar's Bride, Mathilde in Gioachino Rossini's William Tell, Micaela in Carmen, Tatiana in Pyotr Ilyich Tchaikovsky's Eugen Onegin, Volkhova in Rimsky-Korsakov's Sadko, Tsarevna Swan-Bird in Rimsky-Korsakov's The Tale of Tsar Saltan, and the title roles in Giacomo Puccini's Madama Butterfly and Tchaikovsky's Iolanta.

[2] Russian dictator Joseph Stalin loved Shpiller's singing voice, and frequently requested her to perform at banquets held at the Moscow Kremlin for foreign diplomats.

[2] In 1940 she performed the role of Sieglinde in a concert version of Richard Wagner's Die Walküre at the Kremlin for a gala held in honor of visiting German Foreign Minister Joachim von Ribbentrop, an event through which Stalin hoped to cement friendship between Russia and Nazi Germany.

[2][3] She was also granted permission to travel abroad four times during her career, a rare opportunity for Russian artists of that era.