Article continues below advertisementGeorge Michael's estate has generated eye-watering revenue since the WHAM! star's death on Christmas Day 2016, raking in almost $95 million in the years that followed - and insiders tell OK! the massive figure is only set to grow as his "Last Christmas" hit continues to dominate charts around the world.Michael, 53, when he died of natural causes on December 25, 2016, left behind an estate worth around $124 million, most of it bequeathed to his sisters.Article continues below advertisementSource: MEGAGeorge Michael died on December 25, 2016.