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Bookmakers William Hill have massively reduced the odds of Lily Allen making it to the Christmas No.1 with her cover of Keane's 'Somewhere Only We Know'.
The cover, which features on this years animated John Lewis Christmas advert, has had its odds of making Christmas number one cut from 16/1 to 7/1.
A spokesperson explained: "John Lewis's Christmas adverts are becoming just as much a festive tradition as turkey and trimmings and there is a good chance that once people get into the spirit, the single will be flying off the shelves."
Watch the John Lewis advert, featuring Lily Allen's cover, below:
Despite the odds being changed, Lily Allen still faces competition from this years X Factor winner who is currently the favourite to nab the Christmas top spot.
Other artists hoping to top the charts this season are Susan Boyle with her Elvis Presley duet on 'O Come All Ye Faithful' (7/2) and a cover of Wizzard's 'I Wish It Could Be Christmas Everyday' by the stars of ITV2's reality series The Big Reunion (5/1).
Below: The best Christmas songs of all time
