I have lost a beloved friend - the kindest, most generous soul and a brilliant artist.
Michael, age 53, passed "peacefully away at home", the statement from his publicist said.
Last month George was reported to have rekindled his friendship with the man he declared the love of his life, Kenny Goss. The star was found "in bed, lying peacefully".
"The lovely memories and music he brought to the world will always be an important part of my life and those who also loved and admired him".
He was also remembered for small acts of kindness: helping his village in north London get a Christmas tree and volunteering at a homeless shelter.
And to be fair, it's Andrew Ridgeley's lyrical contribution of "Uh huh huh / Oh, oh, Uh huh huh / Doo doo doo / La la la la", that truly sets this song apart. Though Fawaz's Twitter account is not verified, Michael was following it.
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Michael was due to release a documentary about his life and a new album in 2017.
In his solo years, he became known as a more serious singer who had massive hits such as "Faith", "Father Figure" and "I Want Your Sex".
At the time, he told CNN, "I spent the first half of my career being accused of being gay.so I spent my years growing up being told what my sexuality was, really". "For me there was no one else that can take us to that high, joyous place". "From the enormous success he achieved with pop duo Wham! to his influential solo career, his extraordinary talent had a profound impact on countless entertainers worldwide, and his creative contributions will live on forever", he said.
Mr Davies said: "Thank you is not enough". Through his career, the singer who was born Georgios Kyriacos Panayiotou, sold more than 100 million albums in a career that spanned nearly four decades. His last album "Symphonica" (2014) rose to number one in the charts.
His death came in a year which has seen the music industry lose some of its biggest stars including Prince, David Bowie and Leonard Cohen.