'I'd stop working the day I lose my taste'

In an interview with Digital Spy, Cowell, 57, says, "Number one, you have to stay happy. Number two, relevant. If you achieve those two things and success then you're in a good place because this business is tough. "If I ever lost my taste, or the ability to spot an artiste or a hit record, then I would stop really quickly, I wouldn't try and hang on." The 'X Factor' judge also hints at more changes for the ITV reality competition live shows.

"When you've done it for 14 years, you can't keep making the same show every year. I think you have to realise what the contestants are in it for, why do so many people enter."

"I think if you just make the same show each year, it becomes boring and predictable. So you try and make changes for the better... Not everything works but some ideas we've got for the live shows are going to be good."