In the ITV show, Simon Cowell against Louis Walsh in the final after all of Sharon Osbourne's acts were voted out. Three categories of contestants were originally participating, 16 to 25 year olds, 25 and over and groups.

The XFactor betting was available on a number of markets including outright winner, winning manager and winner of each category. The only acts left in The XFactor odds are favourite Steve Brookstein and G4.

Although Saturday's episode of XFactor did not spring any great surprises, bookies William Hill has seen a significant number of bets for the opera-style group 'G4'.

Louis Walsh was worried that G4 might not have the popular appeal but that is definitely not what we are seeing. G4 are now just over even money to win XFactor.

Steve Brookstein is now the odds on favourite under the guidance of Simon Cowell to win the 2010 XFactor series. He has been popular throughout the competition and now faces a one on one battle on Saturday against G4.