"He'd come down to the studio, and I'd say, 'You all right, man? You don't have to come in'. But I suppose if I put myself in his shoes, if I was diagnosed with cancer, being on my own in my head would be a bad f**king area to be in." Ozzy Osbourne can understand why Black Sabbath bandmate Tony Iommi insisted on working after his lymphoma diagnosis last year (12).