Cheryl Cole discusses her relationship with her brother in her new autobiography, 'My Story'.
The 'Call My Name' hitmaker talks about how she visited Andrew in prison when he was only 14.
He had got into a fight and stabbed someone who physically assaulted their sister Gillian in a pub.
"Everyone was in pieces. People were talking about prison, and I was lying awake again, worrying myself sick," she writes.
"He got six years and was locked up in a young offenders' institution to start with as he was too young to for adult jail."
When she won a place in Girls Aloud, Cheryl offered to help him out, but he turned her away.
"I went to see him in prison. 'Why can't you stop?,' I begged him. 'You're devastating the whole family. Why can't you change your ways?'"
"He shrugged and looked me in the face. 'I'm too far gone.' I left in floods of tears. I had the means to help him now if only he wanted to be helped - but he clearly didn't. That hurt like hell."