Ok i need a straight answer...some say George Michael some say Wham....?

who really sang Last Christmas?
i love that song and i want to be debating about the singer whenever i heard the song.
Prove ur answer plz.

George Michael sang it when he was the lead singer of the group WHAM!

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Wham released it in 1984

Wham released it. But of course George Michael is the one singing it since he was the lead singer.