The reality TV star charted her highs and lows since leaving the band in 2001, including the breakdown of her first marriage to Brian McFadden, her drug addiction and being bipolar.
The former band member admitted that it was the breakdown of her marriage to the Westlife singer that sent her life spiralling out of control.
'He left me. He got with somebody else and that absolutely destroyed me. It made me feel a failure as a mother and as a wife'
‘He left me. He got with somebody else and that absolutely destroyed me. It made me feel a failure as a mother and as a wife,’ she confessed.
The mother-of-four also revealed how she and Brian pretended to be a happy couple and tried to make their marriage work after it was revealed he had cheated.
The pair were said to have tried to put on a united front after she was crowned winner of I’m A celebrity in 2004, but the couple split in September of that year.
Brian went on to date Aussie actress Delta Goodrem whom he collaborated with on single Almost Here.
Kerry revealed that her self-confidence plummeted following their break up and became involved with drugs shortly after embarking on a relationship with Mark Croft.
"Cocaine then becomes your bestest friend in the world and it listens to your problems."
And the 32-year-old credits getting healthy to kicking her addiction:
"Exercise, it changed my life. I've been clean for three years,” she revealed.