The new Band Aid single featuring Doncaster’s Louis Tomlinson will receive its world premiere on ITV’s X Factor results show this Sunday.
The video will be shown the day after including One Direction and Ed Sheeran go into a studio to record a new version of Do They Know It’s Christmas?
Other stars taking part will include Emeli Sande, Ellie Goulding, Sam Smith, Bastille, Foals, Chris Martin and Bono.
Money raised by the song will help fund relief efforts to fight the spread of the Ebola virus in West Africa.
The song was first recorded in 1984, raising more than £8m for famine relief in Ethiopia.
The video will be shown on The X Factor at 8pm on Sunday.
The single will be available to download at 8am the following day, priced at 99p. A CD version costing £4 will be released three weeks later.