Stars including One Direction, Emeli Sande, Rita Ora and Ed Sheeran have gone into the studio to record a new version of the Band Aid charity single.
Ellie Goulding, Sam Smith, Chris Martin and Bono are also singing on the reworked Do They Know It's Christmas?
The recording, which comes 30 years after the original Band Aid, will raise money for the fight against Ebola.
Lizo Mzimba reports.