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27 October 2017, 13:25 | Updated: 24 June 2018, 16:15
During his career, George Michael was highly sought after when it came to high-profile duets with some of the biggest artists around.
He sang with pretty much anyone you can think of, and we've selected just a few of the absolute best of the best:
Originally intended as a duet with Michael Jackson, Whitney re-recorded this 1998 solo song two years later for her Greatest Hits collection.
This one-off project allowed George to perform with one of his all-time favourite artists, Aretha. Co-written by Simon Climie of Climie Fisher fame, it was a number one hit in both the UK and US.
George covered this Stevie Wonder classic for his greatest hits collection Ladies & Gentlemen in 1999, and it took George back into the UK top five.
George surprised his fans on tour in 1991 with a special appearance from Elton to perform the latter's classic anthem, and it was so popular that it was released as a single. It reached number one in the UK.
OK, you might not be able to hear it over all the screaming fans, but George surprised everyone by turning up at Beyoncé's O2 gig in 2009.
This song again, but what a performance with the operatic icon in Modena back in 2000.
George always intended this song as an homage to a Paul McCartney-style song, and then in 2006 he re-recorded it with the man himself for his Twentyfive collection.
George performed with Stevie a few times, but our favourite has to be this powerful version of Stevie's classic social song 'Living for the City' for a VH1 special.
Another number one hit. This time, he teamed up with Queen for Freddie Mercury's tribute concert in 1991.
A very young George sang his number one ballad with Motown legend Smokey for a US special back in 1985.