Bee Gees singer Robin Gibb has undergone surgery, just weeks after declaring he was in remission from liver cancer.
The singer is now in hospital recovering after his operation on Sunday.
It is thought the singer is suffering from an intestinal condition, but reports about the cause of his hospital spell remain unconfirmed.
Scroll down for a gallery of images of Robin Gibb throughout the years
He was due to sing at the Royal Philharmonic's premiere performance of The Titanic Requiem in London on April 10, but has been forced to pull out all public appearances.
An spokesperson for the star has said: "On Sunday 25 March, Robin Gibb underwent further intestinal surgery.
"He is currently recovering in hospital and therefore, for the time being, all existing commitments prior to the Titanic Requiem concert, have had to be cancelled."
Last month the star told The Mirror he felt "fantastic" after his recovery.
"'I am beating cancer and can't wait to carry on with my work," he said.
The Bee Gees (L-R) Barry, Maurice, Robin Gibb at Heathrow Airport, London, before leaving for a 3 month World Tour. 1974
The Bee Gees, (l to r) Robin, Barry and Maurice Gibb, accept the Brit Award for Outstanding Contribution in 1997
The Gibb brothers: Barry (centre) and twins Maurice (left) and Robin (right)
Bee Gees Singer Robin Gibb reads to his son Spencer, circa 1974
Bee Gees Singer Robin Gibb with his wife Molly Hullis (r) and two children Spencer and Melissa in his home, circa 1974
The Bee Gees, back row, left to right: Barry Gibb, Robin Gibb, and Vince Melouney. Front, left to right: Dennis Bryon and Maurice Gibb. 1967
Robin Gibb, founding member of the Bee Gees, unveils a plaque honouring the work of the Bee Gees at 67 Brook Street, central London. 2008
Robin Gibb performs at the BBC Electric Proms 2008 - Saturday Night Fever at the Roundhouse, Chalk Farm, London.
Official ambassador Robin Gibb CBE (centre) with his wife Dwina and son arriving for The Sunseeker International Charitable Trust Ball - in aid of The Outward Bound Trust - at Battersea Evolution in south London. 2009
Robin Gibb and his wife Dwina at No.11 Downing Street in London for the Diana Awards.
Members of the Bee Gees pose with Barry Manilow, far right, at the American Music Awards in Los Angeles, Ca., Friday, Jan. 13, 1979. The brothers Gibb, from left, Barry, Maurice, and Robin, won awards for favorite popular group and favorite soul album
The Bee Gees, from left, Robin, Barry and Maurice Gibb, attend a party in 1978
Andy Gibb eats a cherry from his birthday cake at a party given by his family in his home in Miami Beach, Fla., Monday night, March 6, 1979. Andy's brothers, the Bee Gees, from left are, Robin, Barry and Maurice. (AP Photo)
British singer Robin Gibb arrives for the 46th Goldene Kamera (Golden Camera) media award gala in Berlin, Germany, Saturday, Feb. 5, 2011