They'll be in Milano tomorrow, let's hope he'll be ok by then!
He tweeted this :
👋 guys, i pulled a muscle in my back by my rib cage last night on stage which made it painful to breathe and hard to sing :( I tried my best— Olly Alexander (@alexander_olly) March 9, 2016
and the crowd were v supportive I'm just sorry I couldn't give the performance I wanted 2. Resting 2day so i'm back to normal 2morrow, ❤️ u— Olly Alexander (@alexander_olly) March 9, 2016
I was there and it was such a struggle for him, it was hard to watch. Hope you'll feel better soon Olly :-(
Source : me, my ears, my eyes + Source + Source