U2.COM : 'A World Outside Your Window...'

Bono is among a galaxy of stars taking part in a new version of  'Do They Know It's Christmas?' raising funds to tackle Ebola in West Africa.

One Direction, Rita Ora, Ed Sheeran, Chris Martin,  Angelique Kidjo, Jessie Ware, Paloma Faith, Elbow, Emelie Sande, Ellie Goulding, Sam Smith, Seal and Sinead O’Connor are all part of Band Aid 30,  put together once again by Bob Geldof and Midge Ure.

The pair first organised the Band Aid supergroup in 1984, raising £8million for the victims of the Ethiopia famine.

Here's how you can back the cause.