Bee Gees vocalist Robin Gibb, who was diagnosed with liver cancer several months back, was rushed to the hospital last week for treatment. The Mirror reported that the 61-year-old spent five hours at the hospital on Tuesday before heading back to his residence.

Robin's elderly mother and his brother Barry both flew to his side from the U.S. The site quoted a "close friend" of Robin, who said, "Robin is not good and there is a lot of concern for him. You can use your wealth to call in the best experts, but sometimes no amount of fame, prestige and money can change things when it comes to cancer."

The friend continued, “But Robin is a strong character, he is a fighter and has been encouraged by all the online messages from his fans. (Wife) Dwina is doing everything ­possible and hasn’t left his side."

The Mirror said that Robin had also been taken to the hospital last month for severe stomach pains, which forced the cancellation of a number of public appearances.

The Bee Gees -- brothers Robin, Barry and Maurice -- scored a number of pop hits in the '60s but are best known for their disco reinvention in the '70s, when they racked up hits like 'Stayin' Alive,' 'How Deep Is Your Love' and 'Night Fever' from the 'Saturday Night Fever' soundtrack. They were inducted into the Rock and Roll Hall of Fame in 1997. Robin and Barry Gibb have performed together only a handful of times, mostly on television shows, since Maurice's death in 2003.