Michael revealed he suffers with anxiety and a mental disorder which affects millions in the UK.
Speaking to Daily Mail last year, Michael said: “I’d never had a nerve in my body, then this happened.
“All you have to offer as a performer is yourself.
“Our job is to make people feel comfortable and if you’re not, you can’t hide it, everything’s out of kilter.
“You suddenly think, ‘Why I am here?’
“It’s too much responsibility, which you can’t cope with. These thoughts whizz through your head as you’re on stage.
“It’s totally debilitating, creates the panic attack that mean you can’t do what it is, above all, that you want to do.”