Based on the Little Drummer Boy Challenge from the mid-1990s if the player hears the song between those days, they are out of the game and have to post "#Whamageddon" on social media to indicate that they have lost.
[5] One of the earliest documented references of Whamageddon appeared on Maniac-Forum.de in November 2009, an online forum originally linked to German-language video game magazine M!
The rules were nearly the same, apart from the game having no defined start date and ending at midnight on 31 December, and the presence of the song within the discussion thread itself being prohibited.
[9] In December 2023, the DJ at Sixfields Stadium in Northampton, England, played "Last Christmas" to a crowd of over 7,000 people, with the intention of making everyone present lose the Whamageddon game.
This allows enjoyment of Christmas music and not having to worry when walking through a shopping centre or when the radio is playing in the car.