A classical piano concert poster featuring two young female pianists. The design should be elegant and sophisticated, with a grand piano as the central focus. The background should have subtle lighting and musical notes. The pianists are dressed in formal evening attire, one in a flowing gown and the other in a chic dress. Include the concert venue, date, and time in artistic fonts. The overall color scheme should be refined and harmonious, emphasizing the classical and serene nature of the event. Poster size: 24 inches by 36 inches. --s 750 --niji 6