The 40-year-old singer admitted to being disheartened by the reviews but vowed to prove his critics wrong, reported FemaleFirst.
"(My music career started with) getting cigarettes and bottles of beer thrown at us... A producer kept saying, 'The blond one can't sing - get rid of him,' and I knew I could be dropped in a heartbeat. I had to prove them wrong," Keating opened up in an interview with The Sunday Times.
"I'm genuinely excited about it. It's been an issue I've had for most of my career. When you're in a boy band, you're fitting the mould that people want you to be. I spent years foolishly trying to prove myself. I should have concentrated on the people that mattered to me...
"It's a career I've been trying to do for years and years and years. I've been trying for almost as long as the other career," Keating said.