McElderry's song was originally a hit for American star Miley Cyrus in April
X Factor winner Joe McElderry has bounced back from missing out on the Christmas number one to claim top spot with his single The Climb.
The 18-year-old lost out last week to Rage Against The Machine following a high-profile Facebook campaign.
But The Climb sold 196,000 copies in its second week to push the US rock band's single Killing In The Name down to second place in the singles chart.
South Shields singer McElderry said he was "so happy" at reaching number one.
"Thank you so much to everyone that has supported me, this had been the best Christmas ever and I want to wish everyone a very happy new year," said McElderry.
Rage Against The Machine's success last week followed a Facebook campaign that set out to stop a fifth consecutive Christmas chart-topper by the winner of The X Factor.
The campaign's instigators had specifically asked supporters to download the Rage Against The Machine track - initially a number 25 hit in 1993 - in the week running up to the Christmas chart on December 20, meaning it has done well to maintain a high chart position a week later.
Lady Gaga's Bad Romance remained in third place this week, and Cheryl Cole's single Three Words jumped from seventh to fourth.
Starstrukk by 3OH!3 featuring Katie Perry was fifth, while Black Eyed Peas were sixth with Meet Me Halfway.
Completing the top 10 were Journey, Rihanna, Robbie Williams and Kesha.
In the album charts, Michael Buble's Crazy Love replaced Susan Boyle's I Dreamed a Dream at the top.