sentences:  She quickly became one of de Mille's regular assistant choreographers, working on "Allegro" (1947), "Gentlemen Prefer Blondes" (1949), "Out of This World" (1950), and "The Girl in Pink Tights" (1954).Krupska also assisted de Mille on the ballet "Fall River Legend" (1948); de Mille's insistence that Krupska be allowed to dance one performance as Lizzie Borden led to an explosive quarrel with Alicia Alonso, unbeknownst to Krupska herself.Before switching to choreography full-time, Krupska also appeared on Broadway in "The King and I" and the original "Can-Can" (1953).