This chapter examines the reception of the American ‘flapper’ model and how it was interpreted and translated into the interwar Romanian fashion and beauty discourse, into the 1920s model termed as the ‘modern girl’, as opposed to the ‘new woman’ of the 1930s. It follows the evolution of 1920s styles, including Jazz and Hollywood cultures, Jazz, specific fashions like Egyptomania, low-waist hems, short skirts, bobbed hair and striking makeup, alongside US social, economic and ideological concepts. This chapter explores how the Parisian dominance of culture, fashion and beauty was gradually overridden by American sartorial and aesthetic vernaculars, even if the garments and designs themselves still originated mainly from Paris. It thus follows the evolution of the ‘modern girl’ from the demure lady of yore towards the glamorous divas that would come to define Classic Hollywood. The 1920-1929 timeline covers the post-war crystallization of Greater Romania until the Great Depression, which brought about the demise of the ‘modern girl’ and the “Roaring Twenties”. This chapter will use primary materials from published book and periodical sources, as well as items from my personal collection. Its methodology will be based on visual and textual discourse analysis, using fashion as the main connection between characters and contexts.