While studying literature and cinema at the CÉGEP de Rosemont, Pelletier developed her song technique under veteran Quebec singer Lucille Dumont.

In 1985, she recorded a 45 RPM vinyl single entitled "Échec et Mat" (Checkmate) before beginning studies at Berklee College of Music in Boston.

In 1986 Pelletier composed and recorded her first album Premier Contact which received a nomination as "Discovery of the Year" at the Félix Awards.

In 1987, she recorded an album based on Starmania then proceeded to record her second album, À l'état pur (Pure State), that October, with the singles "Pour une histoire d'un soir" and "Tous les cris, les S.O.S.

[1] In March 2019, she was one of 11 singers from Quebec, alongside Ginette Reno, Diane Dufresne, Céline Dion, Isabelle Boulay, Luce Dufault, Louise Forestier, Laurence Jalbert, Catherine Major, Ariane Moffatt and Marie-Élaine Thibert, who participated in a supergroup recording of Renée Claude's 1971 single "Tu trouveras la paix" after Claude's diagnosis with Alzheimer's disease was announced.