UNDATED (CNN) -- Health woes continue for Robin Gibb. The Bee Gees star is in a coma and has pneumonia.

He also recently battled colon and liver cancer. Doctors believe the 62-year-old has a secondary tumor.

Gibb had emergency surgery in 2010 for a blocked bowel and then had more surgery for a twisted bowel.

The Bee Gees soared to popularity after the 1977 film "Saturday Night Fever" starring John Travolta.

The movie was built around the group's disco songs.