The cover of Simon & Garfunkel's "Bridge Over Troubled Water" is expected to be available from Wednesday, June 21, and was recorded in London on Saturday.
The Guardian reports X Factor winner Louisa Johnson was also present at the recording session in Notting Hill, as were Liam Payne, The Who's Roger Daltrey, Kelly Jones, Leona Lewis, and Paloma Faith.
A choir of 300 people, including local singers and residents, will also feature on the track. Their contribution was directed by TV judge Gareth Malone. The single was put together by Simon Cowell shortly after news of the fire broke, which has now claimed over 70 lives.