After singing Jesper Jensen's controversial song "Øjet" (The Eye) on the TV programme Musikalske venner (Musical Friends) in 1970, she gained immediate popularity.
A few years later, her album Hej søster (Hi Sister) with her own songs about the problems faced by women saw the beginning of a successful career as both a songwriter and a singer.
Shortly before she matriculated from school in 1964, she was introduced to the song writer Thøger Olesen (1923–1977) who engaged her as a singer at Tivoli's newly opened Vise-Vers-Hus.
[2] Trille gained immediate success throughout Denmark as both a singer and a feminist on 18 September 1970 after appearing for three minutes on the TV show Musikalske venner where she sang Jesper Jensen's controversial song "Øjet".
[7] It led to one of Denmark's few court cases relating to blasphemy although both she and Danmarks Radio were freed of any crime a year later as the judge could see nothing provocative in the song.
[4] Her 1976 album Hej Søster which expressed her feelings as a mother and a woman reflected the goals of the women's movement, confirming her as a spokesman for their cause.