Star singer Matt Cardle urged Sheffield people to become life-saving organ donors as he visited the city for a special concert.
The X Factor winner told the Donate Life gig he had once been a candidate for an organ transplant as he battled a rare form of kidney cancer as a child.
Matt said: “I’m honoured to be here. It’s such a worthy cause.
“I was a case for donation myself at one stage, but it turns out you can live with one kidney and I’m living proof of that, but there are lots of people out there who do need donations, so why not?
“You’re not going to use them, someone else can.”
The Star’s Gift of Life campaign aims to recruit 12,000 more Sheffield people to the NHS Organ Donor Register before the British Transplant Games come to the city next month.
Saturday’s concert at Sheffield City Hall featured a choir of transplant survivors, who sang to thank their donors and raise awareness of transplantation.
Many more patients will take part in events for the games, from running to archery, at venues across the city during the games.
Singer and TV presenter Aled Jones also performed.
Aled said: “It’s a brilliant cause and I’m proud to be part of it. I’m a donor myself, I’m on the register and I think everyone should be.”
Almost 9,000 people from the Sheffield area have signed up as donors since the launch of the campaign.
n See www.organdonation.nhs.uk