Canadian DJ Rezz (short for Isabelle Rezazadeh) is a star in the world of electronic music, racking up millions of streams and performing at festivals like Coachella and Lollapalooza. But her rise in EDM came at a steep cost to her physical and mental health. She talks to Q's Tom Power about finding a sustainable lifestyle in a profession that involves grueling tour schedules and performing all night into the early hours of the morning.