The star was convicted in 2010 for driving under the influence of drugs and served his sentence in October that year.
George was sent to tough Pentonville prison in London and he found the experience humbling.
He said during a radio interview: ‘I was put in with the paedophiles and the bullies. I didn’t leave my cell very much in those few days.’‘It shook me out of my denial…’ he said. ‘Probably because there was a chance that I had to go to prison.’
50-year-old George kept his struggle with drugs private following the crash.
‘From the day after that crash happened, I started in drug counselling, none of which I made public.’
The star admitted that he called time on his 13 year relationship with partner Kenny Goss and that his time in jail led to a ‘burst in creativity.’
George has made a new album and friend Kate Moss reviewed his new songs for Vogue earlier this month.