Simon Cowell once tried to give up smoking, but failed within minutes.

The 55-year-old X Factor supremo - who has 14-month-old baby Eric with his partner, Lauren Silverman - has revealed he underwent hypnotherapy in a bid to kick the habit, but had another cigarette in his mouth within moments of leaving the session.

He explained: "I tried once to give up smoking, and the first thing I did when I walked out of the hypnotist was light up a cigarette. I actually wanted one more."

Simon was recently hypnotised once more, this time by a dog for the auditions of the reality TV show 'Britain's Got Talent' and has revealed he found it to be the "weirdest feeling".

He told The Sun newspaper: "That was a very strange sensation. Look, I don't know whether it was the trainer or whether it was the dog, but it was the weirdest feeling. It's all on tape.I do start yawning and feeling very light-headed. My last memory was the dog staring at me - and I love dogs - with this really weird look. Then the next thing, the girl is saying: 'Five, four three, two, one, wake up.'"