Lonelygirl15, debuting in 2006, was one of the internet's first massive viral sensations and a pioneer of the Alternate Reality Game (ARG) format on YouTube. What began as a series of innocent, intimate vlogs by a teenager named Bree quickly spiraled into a complex narrative involving a mysterious cult and hidden ceremonies. The discovery that Bree was actually a fictional character played by actress Jessica Lee Rose became a landmark moment in digital history, blurring the lines between reality and fiction. Today, the Lonelygirl15 meme represents the birth of internet fame, the 'fake' nature of social media, and the nostalgic era of early webcam culture.