Although he was considered a "novelty act" during his series, Rylan has become one of the most successful X Factor acts ever.
His stint on ITV's Walk The Line should have marked Simon's return to UK screens after a long absence.
The group will still perform their Europe dates.
The Take That star was prescribed the opioid whilst on tour.
He also says his private conversations "always found their way to the press".
'It was just the most unbelievable force... It had taken our legs from under us.'
Shiny wrapping paper and synthetic party-poppers have a lot to answer for.
'I was hugging myself to keep warm.'
Gary Barlow Compares Ant McPartlin’s Troubles With Former Take That Bandmate Robbie Williams' Struggles
'I just want him to get better, because we’ve all grown up seeing those guys on telly.'