Elena Hurstel is a vocal coach who has directed choirs and accompanied amateur singers in individual coaching. Her YouTube channel has nearly 200,000 subscribers and 7.7 million views.

"The choir allows us to democratize the divine. It offers an outlet, we sing as we want, as we can," she says. "It is also an opportunity to say: allow yourself to speak loudly, to succeed," she adds. The voice is the megaphone of our emotions, of our personality.