Louis Walsh has "a new energy" to him now that Simon Cowell is gone from The X Factor, Dermot O'Leary has said.
The show's host revealed the Irish judge - the only original member of the panel left - aims to make the new series bigger and better than ever before, and take on the US version in the process.
"Louis has got a new energy about him. There is a real sense of Louis being reborn in this panel," he told the Daily Mirror.
"He is really obsessed with making it better. He really wants to beat Simon on the American show."
Dermot, who admitted he "still loves the show" after four years of presenting it, reckoned comparisons between Tulisa Contostavlos and Cheryl Cole are unfair.
"They are two different people. There is only one Cheryl, and because Tulisa is a young girl, people should not compare her. They are very different girls, very different singers and very different personalities," he continued.
"What I love about Tulisa is that she is feisty and honest. And she doesn't have an off button. Tulisa has a great voice and two double platinum albums."
And according to the host, Take That's Gary Barlow settled himself into the top chair immediately.
"I think you can see Gary eased into the head judge's chair quite effortlessly. He has got quite an ambassadorial, almost presidential way about him," revealed Dermot.
"As far as he is concerned, if they don't find a superstar, they have failed."