"It's a Sin" is a song recorded by the Pet Shop Boys which reached #1 on the UK Singles Chart for three weeks in June 1987.
Written by Chris Lowe and Neil Tennant, "It's a Sin" was the lead single from the duo's second "proper" album, Actually. Released in June 1987, it rocketed to the top of the charts to become the duo's second UK number one single. It was also a massive hit across Europe, supposedly the best-selling European single of 1987. In the United States it reached #9 on the Billboard Hot 100 chart .