The FaceApp meme trend took the internet by storm as users began utilizing the AI-powered photo editing application to drastically alter their appearances. While the app offers many features, the 'Old' filter became particularly iconic, leading to a massive wave of 'Age Challenge' posts where people shared hyper-realistic versions of their future selves. This sparked a meme subculture where users applied the filters to celebrities, video game characters, and historical figures to see how they would look aged, gender-swapped, or even forced to smile. The meme serves as a humorous commentary on the power of AI image manipulation and the collective obsession with seeing the 'what if' versions of famous faces.