Singer Paul Potts has handed over £48,000 to a charity aiming to build a rehabilitation centre in Swansea.
The Britain's Got Talent winner from Port Talbot had promised Treat Trust Wales the proceeds from a concert he recently performed in Switzerland.
Founder, Mel Davies, who was told last week she had breast cancer, said the donation was a huge lift to both her and the trust.
It aims to build the £10m centre within the grounds of Morriston Hospital.
Potts visited the hospital earlier to hand over the donation in person.
Mrs Davies, who has successfully fought breast cancer once before, said: "Paul has been just fantastic.
"The cancer diagnosis came at the same time that Paul told us he had raised the money.
"It's rejuvenated me and gave me more than enough strength [to fight it]."
Mrs Davies set up Treat Trust Wales with husband Mike.
They first met when he was the surgeon who treated her when she was left paralysed from the chest down following a motorcycle crash 30 years ago.
They married many years later and devote a lot of their time to campaigning for the centre.
As well as Potts, other celebrity backers include actor Michael Sheen, athlete Dame Tanni Grey-Thompson, former Welsh rugby captain Gwyn Jones and current international James Hook.
The aim of the centre is to help rehabilitate people who have been badly injured in accidents, are recovering from cancer, strokes and other illness.
Facilities are set to include a warm, ramped access swimming pool and integral fitness suites.
The land has been made available by the Abertawe Bro Morgannwg University Health Board.