The 'Mariah Carey Defrosting' meme is an annual internet phenomenon that signals the transition from Halloween to the Christmas season. It refers to the inevitable resurgence of Mariah Carey's 1994 hit 'All I Want for Christmas Is You' on global music charts and in retail stores. The joke suggests that the singer spends the rest of the year frozen in a block of ice, only to begin 'thawing' in late October and fully 'defrosting' on November 1st. Mariah Carey herself has leaned into the joke, frequently posting high-production videos of her being chipped out of ice or changing from a Halloween costume into her signature red Santa suit. The meme perfectly captures the cultural shift into holiday commercialism and the inescapable dominance of her holiday anthem.