Roger Daltrey is treasuring "every minute" he can sing with The Who because his doctor has warned him he could lose his voice "at any time".
The British rocker underwent surgery to remove a pre-cancerous growth from his throat in late 2009, and he has been working with a specialist in Massachusetts to help preserve his vocal chords.
Daltrey hopes he will be able to keep singing for many more years, but he's been told his voice could suddenly disappear without warning.
He says, "I still have to have it looked at regularly as it could go bang at any time. The timebomb's ticking away. What do you do? I just enjoy every minute I have."