Elton John, the Spice Girls, Ed Sheeran, and other major UK performers are allegedly declining invitations to play during King Charles III's coronation in May.
According to Marie Claire, Adele and Ed Sheeran were the first performers to decline the King's invitation.
According to another report from The Daily Express, Elton John, Harry Styles, and the Spice Girls also followed suit due to their busy schedules.
A source told The Sun: "Organizers are working against the clock to pull together an exciting lineup but have hit a series of challenges."
With Harry Styles being on his global 'Love On Tour', and Elton John wrapping up his 'Farewell Yellow Brick Road The Last Tour' the two singers aren't believed to be able to make it work amid travelling.
Victoria Beckham, Mel C, Mel B, Geri Horner, and Emma Bunton were almost confirmed to reunite for the concert special, but that opportunity fell through.
If you thought that was it, Robbie Williams has also been rumoured to have turned down the invite to perform.
Despite this, Robbie's former Take That bandmates Mark Owen, Howard Donald and Gary Barlow are still confirmed and preparing to headline the concert.
Other acts still giving the thumbs up include Andrew Lloyd Webber, Kylie and Dannii Minogue, and Lionel Richie.
The coronation of the King and Queen Consort Camilla Parker Bowles is set for May 6 at Westminster Abbey.
Celebrations will follow over the weekend with Coronation Concert on May 7.