He said he only signed up for the show because he was feuding with his Aerosmith band mates and it was "something to do while the storm blew by."
He explained to Rolling Stone, "I loved it and hated it. It was a great job, I sat next to J. Lo and I made a ton of money. It was a moment in life and it became larger than life."
However -- he said he didn't like the pressure he felt to be mean to the contestants. He explained, "The show's about kids and what you do to nurture their talent. They wanted me to take the piss out of the kids and I don't have that in me. That's not what I'm about. That's more about that other guy. Not me."
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