[Arneldo]

Louis Walsh has renewed his feud with X Factor rival Simon Cowell.

The show's judge, who is mentoring the groups, is determined to repeat his success on last year's series and believes that one of his acts can win.

"Simon is not as good as Simon thinks he is," Louis told The People. "Me and Sharon Osbourne know more about the music business. Simon Cowell is in the Simon Cowell business. He's too busy doing American Idol and running around the world to concentrate on the music."

He added: "I know about groups - I had Boyzone and I had Westlife and Girls Aloud. I'm absolutely confident I can beat him. Look what happened when I had the groups before. G4 are on their third album now. But where is Steve Brookstein? Has anyone seen him? There's a reward for anyone who can find him."