Yes indeed you can hear Quebeckers who sing in English on the radio, people like Céline Dion for example. But as soon as it comes to the same songs in French, all of a sudden, it seems that there's a desire to sideline them.
Ce que l'on veut entendre, ce sont les Québécois qui chantent en anglais, comme Céline Dion quand elle chante en anglais.