Bee Gees star Robin Gibb has colorectal cancer and remains in intensive care after waking from a coma.
According to the Associated Press, Dr. Andrew Thillainayagam said Gibb was being treated for advanced colorectal cancer when he caught pneumonia as a result of his weakened immune system and fell into a coma.
Thillainayagam said Gibb, 62, is now lucid and talking to his loved ones, but is "exhausted, extremely weak and malnourished."
"It is testament to Robin's extraordinary courage, iron will and deep reserves of physical strength that he has overcome quite incredible odds to get where he is now," Thillainayagam said in a statement.
BBC reported that his doctors say they have been "confounded" by his recovery since waking from a coma.
More from GlobalPost: Bee Gees singer Robin Gibb wakes from coma, reports say
He had been hospitalized for stomach and colon problems, though he has not specified the exact nature of his illness — widely reported to be cancer.
The AP reported the Bee Gees had a string of disco-era hits including "How Deep is Your Love" and "Stayin' Alive." The British-born, Australia-raised brothers Robin, Barry and Maurice Gibb made up the group.
According to Reuters, they sold an estimated 200 million records during a career spanning more than 50 years.
More from GlobalPost: Tough times for Australian billionaires