Ex-Wham singer and solo artist George Michael has died at the age of 53. Michael may be remembered best — at this time of year, particularly — as the singer of one of the most iconic and best-loved Christmas songs: Wham's "Last Christmas." But he also had a long solo career after Wham split in 1986, attempting to recast himself as a more serious musician after a start singing poppier fodder, scoring several number one singles and albums around the world in the process.