It's a Sin was released by Pet Shop Boys in 1987 as the lead single from their second album, Actually, and became one of the duo's biggest hits, topping the UK Singles Chart. Written by Neil Tennant and Chris Lowe, its theatrical synth-pop sound and provocative lyrics about guilt and Catholic upbringing made it instantly distinctive. Decades later, the opening in particular has been clipped and shared online for edits and memes, keeping the song familiar to audiences who may never have heard the full track.