AceShowbiz -

Barely three weeks after he announced that he was in a spectacular recovery from colon cancer, Robin Gibb is having a setback on his health. The 62-year-old singer was admitted back to hospital although his representative said that it was merely routine check-up. "Robin is at the London Clinic as part of his treatment and rehabilitation," the rep said.

Gibb amazed doctors with his fight against the colon and liver cancer. A family source told The Sun, "We feared the worst. But doctors have said they are astounded at his response to treatment." He was diagnosed with the disease five months ago but was back on stage earlier this month to sing in front of injured servicemen in a Coming Home charity concert at the London Palladium.

Speaking of his cancer battle to BBC Radio 2, the Bee Gees member said, "I've been treated by a brilliant doctor, and in their own words, the results have been spectacular. And they said "What are you doing that we don't know about?' " He added, "The prognosis is that it's almost gone and I feel fantastic. Really from now on it's just what they could describe as a 'mopping-up' operation."