George Michael has pulled out of his first live concert for five years after being struck down by laryngitis.
Michael has sung on TV shows, but not in concert, since 1999
He had been among stars due to perform at a breast cancer charity gig hosted by former Spice Girl Geri Halliwell at London's Royal Albert Hall.
Ronan Keating, Natasha Bedingfield and Tom Jones are among the performers who are still appearing on Sunday.
Michael, who lost his mother to cancer several years ago, will instead make a £50,000 donation to the charity.
He and Halliwell, who will host the concert, fell out a couple of years ago but have since made up. Michael's last concert appearance was at Net Aid in 1999.
The concert is part of the Tickled Pink campaign,
which aims to help various breast cancer causes.
A statement on Michael's website said: "He's devastated to miss the show Geri has organised, after all the hard work she's put into it."