Nightcore is the genre that takes existing songs and speeds them up, creating a high-energy, hyperactive sound. Emerging from the internet music community in the early 2000s, it was popularized by anonymous producers and fans who created nightcore remixes of popular tracks. Nightcore's fast tempos, pitch-shifted vocals, and frenetic energy make it a favorite for those seeking an adrenaline rush. Today, it continues to thrive online, with countless remixes and channels dedicated to its unique, high-octane sound.