His publicist confirms “George Michael has passed away peacefully at home”.
During the course of his career, Michael sold more than 100 million records worldwide.
Thames Valley Police said South Central Ambulance Service attended a property in Goring in Oxfordshire at 13:42 GMT on Christmas Day.
Police say there were no suspicious circumstances.
In a statement, the 53-year-old star’s publicist said: “It is with great sadness that we can confirm our beloved son, brother and friend George passed away peacefully at home over the Christmas period.
“The family would ask that their privacy be respected at this difficult and emotional time. There will be no further comment at this stage.”
His Wham! bandmate Andrew Ridgeley and close friend Elton John have lead the tributes to the star on social media.
Posting on Twitter, musician Ridgeley wrote: “Heartbroken at the loss of my beloved friend Yog. Me, his loved ones, his friends, the world of music, the world at large. 4ever loved. A xx”
Meanwhile Elton John posted a heartfelt message along with a picture of the pair together on his Instagram page.
He said: “I am in deep shock. I have lost a beloved friend – the kindest, most generous soul and a brilliant artist.
“My heart goes out to his family and all of his fans.”
You can share your memories of meeting George Michael, or tell us what his music meant to you by tweeting us at @outnewsglobal