David Bowie's life will be celebrated at a tribute concert on Sunday night, a week after the musical pioneer died following a private fight against cancer.
Three pews at London's Union Chapel in Islington have been reserved for friends and collaborators of the Ashes to Ashes singer.
Organisers said the line-up will remain a closely-guarded secret, although more than 20 performers have been pencilled in to appear.
The sold-out show - Starman: A celebration of David Bowie - will provide an opportunity for people who have been inspired, influenced or touched by his work to pay tribute to the visionary musician, known for hits including Changes, Let's Dance and Heroes.
About 900 people are expected to attend.
Event organiser Stefan Simanowitz said: "The massive response from musicians and from the public has been staggering but not surprising.
"The world would be a very different place without David Bowie and many people feel a distinct need to say goodbye to him.
"Sunday's event is for everyone whose lives have been touched by his music and is set to be a fitting tribute to a man who has meant so much to so many."
Doors will open at 4pm and attendees will be greeted with the sound of Bowie tunes played on the chapel's organ.
The service will open with a mass karaoke sing-a-long of Starman with words projected onto a huge screen above the stage which will also be used to display clips of Bowie interviews from across the decades.
News of Bowie's death, at the age of 69 and two days after the release of his final album, Blackstar, was confirmed on Monday.
Fans later held an impromptu street party in Brixton, south London, where the so-called Thin White Duke was raised.
His records, including Blackstar, dominated the album charts following his death.