Parisians take the summer solstice seriously, as an opportunity to throw a city-wide “fête de la musique,”’ where every street corner café is awake with live music. Taking the yearly ritual to the next level, on Friday, Balmain creative director Olivier Rousteing seized the opportunity to combine his spring-summer 2020 men’s show with his own Balmain-branded music fest, starring Darren Criss on vocals.