Isabelle Boulay, CQ (born 6 July 1972) is a French Canadian singer.
Born in Sainte-Félicité, Quebec, where her parents owned a restaurant, Boulay moved to the nearby city of Matane at the start of her adolescence, and studied literature at Cégep Limoilou. In 1988, her friends signed her up, without her knowledge, for a singing contest in Matane, where she made the acquaintance of Josélito Michaud, who later became her agent. In 1990, at the Petite-Vallée song festival, she won an award for her performance of "Les gens de mon pays" (Gilles Vigneault). The following year, in 1991, she won the Granby song festival for her rendition of "Amsterdam" (Jacques Brel) and "Naufrage" (Dan Bigras). She was also invited to take part in the festival Les FrancoFolies de Montréal. In 1992, she performed in France at Théâtre Dejazet, introducing Bill Deraime. In 1993, she represented Radio Canada at the "Truffe de Périgueux" festival held in Périgord, France, and was awarded the prize for Best Singer in the "chanson francophone" category.