On tours, she sang in four and five productions during a single week. She could learn a part in a new opera in two days, and develop the character of a role in another three or four. Her repertoire totaled 63 parts. In the history of music, Krushelnytska is known as an active promoter of the works of her contemporaries, and of Richard Wagner. In 1902 she starred in a successful production of "Lohengrin" in Paris. In 1906 she appeared to acclaim at Milan's La Scala in Richard Strauss's "Salome", conducted by Arturo Toscanini. She also performed in other theatres across Europe, Egypt, Algeria, Argentina, Brazil, Chile and others.