Helen 'Pepsi' Demacque, George Michael, Andrew Ridgeley and Shirlie Holliman of Wham performing on stage in 1985. (Photo by Michael Putland/Getty Images)

Helen 'Pepsi' Demacque, George Michael, Andrew Ridgeley and Shirlie Holliman of Wham performing on stage in 1985. (Photo by Michael Putland/Getty Images)