In Chapter 3, the student can be found in the bar. Read her emotions and then ask Steph & Ryan about the song. Then talk to Jed about it. You can then find the song behind the monitor at the bar and put it into the jukebox to play it!
Timestamps:
0:00 - Memory: Bomber Jacket (Scene: It's a Simple Plan)
0:39 - Side Quest: Student's Lost Song (Scene: It's a Simple Plan) [Earworm Squasher Achievement / Trophy]3:00 - Memory: Dollar (Scene: Thaynor, Monster Slayer)
3:32 - Memory: Appointment Slip (Scene: Thaynor, Monster Slayer)
4:13 - Memory: Old Paper (Scene: Thaynor, Monster Slayer)
4:59 - Memory: Valkyrie's Dish (Scene: Thaynor, Monster Slayer)