Eighties pop duo WHAM! are reforming for a one-off Christmas extravaganza twenty years after their split, according to newspaper reports. Singer GEORGE MICHAEL has persuaded his former partner-in-pop ANDREW RIDGELEY to reunite for a festive concert at London's Wembley Arena. They will be joined on stage by their original backing singers PEPSI and SHIRLIE. A friend revealed to British newspaper The Sunday Mirror, "George is thrilled that Andrew's agreed to perform. "It was something George had thought about for a long time. He couldn't be happier and can't wait for the gig."