Bee Gees star Robin Gibb has shown signs of recovery after waking from a coma by responding to his family, his spokesman said.
The 62-year-old singer fell into a coma last week after contracting pneumonia in his battle against colon and liver cancer.
His spokesman Doug Wright today confirmed that Gibb had been able to nod and communicate with his family members, who have surrounded his bedside for almost his entire stay in a central London hospital.
Gibb's relatives have said they have been singing to him while in hospital, with wife Dwina revealing he cried when she played him the song Crying by Roy Orbison.
Gibb had surgery on his bowel 18 months ago for an unrelated condition, but a tumour was discovered and he was diagnosed with cancer of the colon and, subsequently, of the liver.
It had been thought his cancer was in remission but the latest deterioration in his health coincides with reports of a secondary tumour.
Gibb's twin brother and bandmate Maurice died from the same bowel condition that initially led doctors to operate on Robin.
His younger brother Andy, who was not part of the Bee Gees but a successful singer in his own right, died in 1988 from heart failure at 30.
The singer's son Robin-John, 29, had been due to premier a collaborative classical work, The Titanic Requiem, with his father earlier this month, but he had to go ahead with the event without his dad due to Gibb's poor health.
Gibb last performed on stage in February, supporting injured servicemen and women at the Coming Home charity concert held at the London Palladium.
The Bee Gees, which was formed in Australia, will be best remembered for their contribution to the soundtrack of 1977 film Saturday Night Fever, which turned disco music into a worldwide phenomenon and placed the distinctive look of the era's hairstyles and outfits into pop culture legend.