Simon Cowell seems impervious to stress but it has been revealed that at the start of the summer, the music mogul suffered a breakdown in America.
Things got a little bit too much for Simon as he started work on the latest series of The X Factor in America and he was struck down with nervous exhaustion.
Quoting updates from Tom Bower's book on Simon, The Sun reports the collapse was the real reason why he missed filming on the audition stages of the show, when he was said to be suffering from bronchitis.
He apparently told Louis Walsh: "I desperately need peace. I'm craving normality. I've got to work out my demons and come out of it."
Simon even said he felt like he was turning into a "weird vampire" because his lifestyle meant he would only reply to texts and emails from friends during the night.
His doctor ordered him to cut out all medication and health supplements to help his body recover, and was also told to stop smoking.