Winther trained as an opera singer and made her professional debut in 1957 at the Royal Danish Theatre, where she would be employed for 30 years both as a singer and a dramatic actress. In 1962, Winther won the Danish Eurovision Song Contest selection with the song "Vuggevise" ("Lullaby"), and went forward to the seventh Eurovision Song Contest, held in Luxembourg City on 18 March. "Vuggevise" finished in joint 10th place out of 16 entries.