"ITs a xmas i will never forget finding your partner dead peacefully in bed first thing in the morning".
His revelation comes as fans continue to leave flowers and tributes outside the former Wham! frontman's homes in Goring and Highgate.
Michael's career began with the duo Wham in the 1980s, churning out hits like "Wake Me Up Before You Go-Go", and "Last Christmas" and continued into the 90s after he launched his debut chart-topping solo album "Faith" in 1987.
"It is with great sadness that we can confirm that our beloved son, brother and friend George passed away peacefully at home over the Christmas period", the publicist's statement said, according to the BBC.
Michael's manager Michael Lippman told Billboard that his cause of death was believed to be heart failure.
Among the singer-songwriter's many hits, he is best known for "Careless Whisper", "Faith" and "Last Christmas". Along with Ellen DeGeneres, George Michael was one of the few big stars who openly spoke about their homosexuality in the 1990s.
Aside from his very amusing self-deprecating sense of humour, Michael was known for various acts of kindness and decency, however he didn't publicise any of them.
Sadly, George has also dealt with drug problems throughout his short life. "Always ahead of his time".
"He did announce he was gay and then openly went on to chat shows to talk about it, and when I saw, or read, what he said it was so eloquent", Simon said.
"It was never straightforward but Kenny is the love of his life and is really good for him, so this is very good news", they said. I certainly did, and I worked hard to get it.
"Very sad to hear the news about George Michael. He was a private man", he said.
Celebrities and friends paid tribute to Michael on Twitter.
Mr McDonagh, originally from Armagh, said: "He touched a lot of people". Those who have it - and you obviously do or today's Calendar cover article would have been about Rudy Vallee - those who have talent must hug it, embrace it, nurture it and share it lest it be taken away from you as fast as it was loaned to you. Thank you for your radical activism in the LGBTQ community!
In the video from their rehearsal (seen here or below), Michael is seen singing along as he watches them duet (beginning at the 2:13 mark).
Michael was originally born Georgios Kyriacos Panayiotou, in London, on June 25, 1965 to a Greek immigrant father and a British mother.