The Hillsborough charity single was announced as the festive number one earlier this evening, with Arthur's 'Impossible' coming in at number two.
'He Ain't Heavy, He's My Brother' outsold the X Factor winner by over 45,000, copies and profits from the single will go to supporting the families of the victims of the 1989 disaster.
Arthur tweeted after the announcement: "He ain't heavy he's my brother the deserved Xmas number 1. Beautiful song and a very worthy cause. Bless all affected by the disaster #LOVE."
He had posted on the social networking site earlier this week to encourage fans to help get the charity single to number one.
He posted: "Platinum single baby! Not a bad start :) thanks to all who bought it now make sure the hillsbrough tune is number 1!! #LOVE."
Arthur's 'Impossible' reached number one in the charts last Sunday (December 16) and had been ahead of The Justice Collective earlier in the week.
Watch the video for The Justice Collective's 'He Ain't Heavy, He's My Brother' below: