Summer stayed in New York and auditioned for a role in the counterculture musical, "Hair". She landed the part of Sheila and agreed to take the role in the Munich production of the show, moving there after getting her parents' reluctant approval. She eventually became fluent in German, singing various songs in that language, and participated in the musicals "" (the German version of "The Me Nobody Knows"), "Godspell", and "Show Boat". Within three years, she moved to Vienna, Austria, and joined the Vienna Volksoper. She briefly toured with an ensemble vocal group called FamilyTree, the creation of producer .