London: Bee Gees legend Robin Gibb is lying in a coma amid fears that the singer has only days to live. The 62-year-old star, who has been fighting colon and liver cancer, is in hospital after he developed pneumonia.

His wife Dwina, Brother Barry, 65, daughter Melissa, 37, and sons Spencer, 39, and Robin-John, 29, were at his bedside at a private hospital in Chelsea, West London, as reported.

'How Deep Is Your Love' hitmaker seemed to have made a miracle recovery from cancer but doctors fear the singer has a second tumor and pneumonia has complicated things.

"Our prayers are with Robin. He has kept so positive and always believed he could beat this. Sadly, it looks like he has developed pneumonia, which is very bad in his situation," a family source told the newspaper.

Gibb's health problems began in October 2010, when he had emergency surgery to treat a blocked bowel. He then had surgery to treat a twisted bowel. Colon cancer was diagnosed and it spread to his liver.

As he battled to recover, the star launched into composing a requiem for The Titanic. The music, co-written with his son Robin-John was premiered in central London on Thursday but Gibb was too ill to attend.

The Bee Gees, consisting of Robin, Barry and Maurice, sold more than 200 million records. Their hits include 'Gotta Get a Message to You', 'Massachusetts', 'Stayin Alive and Night Fever'.