Burke has Xmas No.1 "in the bag"

X Factor winner Alexandra Burke will definitely have this year's Christmas number one, a major music retailer has claimed.

'Hallelujah', which was released online yesterday, is the fastest-selling download ever and its position at the top of the chart on Christmas Day is virtually guaranteed, according to HMV.

Bookmakers Ladbrokes also predicted that Burke will be number one, with spokesperson Nick Weinberg saying: "It's as close to a certainty as you're likely to find."

Burke won Saturday's live final of the ITV1 show, beating JLS and Eoghan Quigg to claim a recording contract worth £1 million.

> Click here for our review of 'Hallelujah'