Singer Robin Gibb is in a coma Sunday after entering a London hospital to be treated for pneumonia. The Bee Gee had been recovering since undergoing treatment for cancer and was said to be in improving health. Gibb was scheduled to attend the premiere of a new classical work April 11, but had to miss the performance because of his worsening condition. The 62-year-old Gibb was treated for colon and liver cancer 18 months ago.
