Sam Bailey has become the first X Factor winner to score the Christmas number one single since 2010, after her debut track Skyscraper soared to the top of the festive charts.

The former prison officer – who was crowned X Factor 2013 champion ahead of Nicholas McDonald last Sunday night – had been the hot favourite to take the number one spot, with several bookies paying out even before the chart had been revealed.

And ultimately she ended up shifting twice as many copies as her nearest rival Pharrell Williams, whose track Happy had to be content with the number two spot.

All proceeds from sales of the song – a cover of a Demi Lovato hit – will go towards Great Ormond Street Hospital Children’s Charity as well as Together For Short Lives, which helps the families of children with life-threatening illnesses.

“Being Number 1 is absolutely amazing,” Sam told the Official Charts Company.

“It really is the icing on the cake and it means Great Ormond Street Children’s Charity and Together For Short Lives will benefit from the single, which makes it extra special.”

Fellow X Factor winner Leona Lewis finished at number three in the chart with One More Sleep – which she performed on a recent Sunday night results show – while AC/DC were at four with Highway To Hell.

That song, originally released in 1979, made its bid for festive chart glory after becoming the subject of a Facebook campaign to beat the X Factor winner to the top.

The last X Factor champion to reach the top spot for Christmas was Matt Cardle, who did the honours with his debut track When We Collide.