Late Bee Gee Robin Gibb refused to visit doctors for scans that could have detected his illness because he wanted to go on a world tour that included three New Zealand shows.
Gibb, 62, died after a long battle with colon and liver cancer.
His widow Dwina Gibb, 59, told the Daily Mail Weekend magazine that the music star initially ignored her pleas and doctors' advice to have the cancerous cells fully checked.
The illness was discovered in October, 2010 when surgeons operated to remove an intestinal blockage.
Mrs Gibb said she and her son Robin John, 29, were unable to persuade him to drop his musical commitments.