What is Whamageddon? The viral trend that has people avoiding Wham's "Last Christmas"

Whamageddon is upon us. The viral trend has had people avoiding Wham's 1986 song "Last Christmas" each holiday season for about 18 years. It's a simple game that has participants across the world hoping they can make it to Dec. 25 without hearing the holiday breakup ballad.

The game – which can be played by anyone, anywhere – kicks off Dec.1. All you have to do is avoid hearing "Last Christmas" by Wham until Dec. 25. If you make it, you win.