The 'Nothing Compares 2 U' singer explained as a child she prayed to God for a ''way out'' until she discovered rhythm through her footsteps at the age of six.
She said: ''I would definitely be dead if not for music. I prayed very fervently as a small child that God would give me a way out.
''And I remember distinctly walking home down this laneway, I can't have been more than five or six, and with the rhythm of my feet I began to hear music, and within that second I made the association with the Holy Spirit, and I said thanks to it.
''I felt it was the answer to the prayers. I get to stand there and scream and I have a right to, 'cause what else am I gonna do?''
The 45-year-old star - who released her new LP 'How About I Be Me (And You Be You?)' last month - admitted she now sees her records as ''diaries''.
Sinead added in an interview with the Daily Telegraph newspaper: ''My records are diaries to me. They started out in anger and recovery, and there is a journey and I'm pleased that it has reached a place of happiness.''