Chris Pizzello/Invision/AP 1 / 5
Chris Pizzello/Invision/AP 1 / 5

LONDON (AP) -- Bee Gees star Robin Gibb has undergone further surgery following a sustained illness, a publicist said Wednesday.

Gibb is recovering in the hospital after intestinal surgery over the weekend and has been forced to cancel a number of commitments, publicist Doug Wright said.

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Gibb is slated to attend the Royal Philharmonic's premiere performance of "The Titanic Requiem" in London on April 10, and will perform a new song, "Don't Cry Alone."

The requiem, a classical composition by Gibb and his son, RJ, commemorates the April 1912 sinking of the ocean liner and the loss of more than 1,500 lives.

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Gibb, 62, was hospitalized late last year for stomach and colon problems, but told the BBC last month he was making a good recovery. He did not disclose the nature of his illness, but said a growth on his colon had been removed.

Gibb has lost weight and has appeared extremely gaunt in his rare public appearances.

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The Bee Gees had a string of hits in the disco era, including "Stayin' Alive."