Passionate about music and dance, Sonia Du Four (alias Sonia Dufour) made her debut in Brussels in 1968 in the musical King Singer.
Little by little, she began to write her lyrics and music. In the 1970's, she worked in the studio and performed with different small groups.
In early 1980, she met Arno Hintjens (Arno), singer at the time of the group TC Matic. Accompanied by the musicians of this group, she recorded four co-signed songs S. Dufour / A. Hintjens and intended for an album which will not be made in the end.
But 2 singles will be produced and distributed: Bonjour / Je Continue Sans Lui (1981) and Toi Et Moi ? / Ce Soir (1982).
She also started a group, called Brux-Elles, made up of girls with the exception of the guitarist.
At the same time, she works as press officer for the artists of [l35326].
In 1986, she decided to stop and travelled around the world.
A few years later, she returned and settled in France, in Meudon. She then resumed the music but in a low-profile way.