Hi Manfred. Yes, she did have a serious car accident in 1966 as you say, but her chart career was already over by then. She only had a few minor hits, some of which were covers of American hits by US girl singers like Sue Thompson (Norman and Sad Movies) and Joanie Sommers (Johnny Get Angry). She recovered from the accident but I don't know what happened to her after that. Her singing style was probably put out of fashion by the Beatles and other groups.