According to the Daily Mirror, the singer had spent Saturday night having a late dinner with friends in Mayfair. Yesterday he attended a memorial service for his mother Lesley, who died of cancer 10 years ago.
In 1998 Michael was arrested for lewd conduct after propositioning an undercover police officer in a public lavatory in Beverly Hills.
The singer was fined £450 by a US court and ordered to do 80 hours community service.
The offence marked a shift in his career, publicly confirming for the first time that he was gay. He later sent himself up in a music video portraying the arrest with the song Outside.
Most of the early Nineties were spent in a legal fight with his record company Sony, which he accused of turning him into a "pop slave". The dispute was only resolved when Virgin and Dreamworks paid £23.8 million to release him from the multi-album contract.
Michael, who was born in London, formed Wham! in 1981 with his school friend Andrew Ridgeley and they had a string of number one hits, including Wake Me Up Before You Go Go and Club Tropicana.
His first solo album, Faith, released in 1988, sold in excess of 10 million copies.
The star lives with his long-term lover Kenny Goss.
