I wanted to have music that made sense for the characters, emotionally speaking. It’s music that would elicit emotion without trying too hard. The music all comes from this mix-tape that’s been given by the father. Steve’s father made a mix-tape based on whatever songs they heard while driving on a road trip in California. The three of them went on this road trip before he died and he made a mix-tape with all the songs from that road trip. That’s what Die explains in that Celine Dion scene. That’s where the songs come from. It’s a way to use music that’s diagetic. It’s not me playing music on the film. It’s music playing in the film. The characters are in sole control of that soundtrack. - Xavier Dolan