Robbie Williams regrets releasing 'Rudebox'.

The 38-year-old singer thinks his 2006 album of the same name may have been more successful if he'd chosen another track to be the lead single.

Asked what he regrets in life, he said: ''I wish I hadn't released 'Rudebox' as the first single from the album of the same name - a different one would've been better. And many embarrassing gaffes have been committed to You Tube for eternity.

''But these days I concentrate on more important things than regrets.''

Robbie - who has four-month-old daughter Teddy with wife Ayda Field - also admitted that, though he is a ''show-off'', he is not particularly ''brilliant'' at anything in his life.

He added to Grazia magazine: ''I'm best at showing off! When it comes to that, I'm the best in the world.

''If I'm honest, I'm quite good at everything, but not brilliant at anything. I'm an all right singer, an all right dancer, and I play pool and football quite well.

''Although when it comes to academic stuff I'm terrible.''