Christmas number one 2013: X Factor winner Sam Bailey beats Pharrell Williams with 'Skyscraper'
Robbie Williams keeps One Direction off the top spot in the albums chart
The 36-year-old former prison officer sold 149,000 copies of the Demi Lovato cover, more than double that of US rapper Pharrell Williams, who secured the second spot with his track "Happy".
Bailey, who was crowned X Factor winner last week, is splitting all proceeds between Great Ormond Street Hospital Children's Charity and Together For Short Lives, a charity which helps children with life-threatening conditions.
Chancellor George Osborne has agreed to waive VAT on the release.
Bailey told OfficialCharts.com: "Being Number 1 is absolutely amazing.
"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."
Despite the annual anti-X Factor campaign, this year led by AC/DC’s 1979 single, "Highway to Hell", Bailey’s track has become one of the fastest-selling singles of the year.
"One More Sleep" by the 2006 X Factor winner Leona Lewis came in third spot and "Highway to Hell" took fourth place, giving AC/DC their first ever top ten hit.
Robbie Williams held on to top spot in the album chart with Swings Both Ways.
The Take That star's record was neck-and-neck midweek with One Direction's Midnight Memories and Gary Barlow's Since I Saw You Last in a tight race.
But Williams beat off One Direction by less than 200 copies after both acts sold more than 126,000.
TV review Nick Hewer, the man whose eyebrows speak a thousand words, is set to leave The Apprentice
Film The critics but sneer but these unfashionable festive films are our favourites
TV We're so close to knowing what happened to Oliver Hughes, but a last-minute bluff crushes expectations
Arts & Ents blogs
- 1 Nigel Farage: Me vs Russell Brand on Question Time – he's got the chest hair but where are his ideas?
- 2 Harry Potter fans can apply to the Hogwarts-inspired College of Wizardry
- 3 Jessica Chambers: 19-year-old woman 'doused with lighter fluid and burned alive' in the US
- 4 Russell Brand calls Nigel Farage 'poundshop Enoch Powell' in BBC Question Time debate
- 5 Orange Wednesdays are no more
Peter Lik: The self-proclaimed 'fine-art photographer' whose work sells for millions
The best underrated Christmas movies from Love, Actually to While You Were Sleeping
Grace Dent on TV: The Lost Honour of Christopher Jefferies was a beautifully shot, immensely considered drama
The Lost Honour of Christopher Jefferies, review: Jason Watkins is brilliant, but real victim Joanna Yeates is reduced to a footnote
Marilyn Manson denies involvement in shocking Lana Del Rey rape video
Disgruntled RBS worker writes hilarious open letter to Russell Brand after anti-capitalist publicity stunt leaves him hungry
Nigel Farage defends Kerry Smith 'ch***y' comment: 'If you are going for a Chinese, what do you say you’re going for?'
Nigel Farage's approval rating hits 'record low' as popularity suffers in wake of Ukip sex scandal
Pakistan school attack live: Taliban kill at least 132 children in 'horrifying' massacre
Sony hack: Angelina Jolie branded 'seriously out of her mind' in further embarrassing leaked email saga
Panic Saturday: 13 million Britons spend £1.2bn – while 13 million others across the country live in poverty unable to afford food