- Video report by ITV News Correspondent Angus Walker
George Michael's family have been "touched beyond words" as tributes continue to be left outside his house in north London.
ITV News Correspondent Angus Walker said: "Despite being a pop superstar under intense public scrutiny, it is now emerging he was a secret, generous philanthropist."
Among those to pay tribute was Childline founder Esther Rantzen.
She told ITV News: "He made it absolutely clear that he didn't want anyone to know that he was going to help us.
"Over the years, he not only gave us the royalties from Jesus To A Child - which is one of his most beautiful songs - but he also gave us millions of pounds."
She added: "He has helped hundreds of thousands of children."
Jo Maidment said she wishes she could have been able to personally thank the singer for his generosity before he died.
The former Wham! singer's publicist described the wave of reaction to Michael's death as an "incredible outpouring of love".
The thing I'll always remember about George on the times I met him, was his incredible vulnerability.