21 Seconds was released by London collective So Solid Crew in 2001 as a UK garage single, built around the idea of giving each MC a brief turn on the microphone. It topped the UK Singles Chart and became one of the defining records of the early UK garage scene, helping bring the collective and the genre to a mainstream audience. Decades later, short clips of its urgent verses still circulate in edits and DJ sets, where the track's tight structure and nostalgic early-2000s London sound continue to appeal to both original listeners and new fans discovering UK garage.