Dermot O'LearyDermot O'LearyDermot O'Leary is singing Vernon Kay a little song.

It goes something like this: "Liar liar, pants on fire."

The new X Factor host reckons Vernie is telling porkies, after he said he would have turned down the X Factor gig if he were offered it.

A bit of friendly rivalry here boys, going back to the days of Mr Kay taking over from Mr O'Leary on T4?

Dermott told heat magazine: "Unless you're Jonathan Ross or Ant and Dec... if you say you'd turn it down, you're full of s***."

"Everyone else who says they'd turn it down, they're lying.

"Even Davina McCall wouldn't turn that job down - she told me herself."

G vernon kay serpentine party jul 06Vernon KayPistols at dawn.