Wham!'s Andrew Ridgely and Pepsi & Shirlie also remember late singer's legacy
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Aiming for a pop hit, George Michael and Andrew Ridgeley achieved Christmas-music immortality with 1984 track
Late star radically revised his image with every hit, making a career out of sexual and stylistic provocation
Former Wham! singer and massively successful soul and pop solo vocalist dies "peacefully at home"
Singer was airlifted from car crash almost two weeks ago
Singer airlifted to hospital in England