"Sin Sin Sin" is a song by British pop singer Robbie Williams, it was released as the fourth and last single from his album Intensive Care in the summer of 2006. It was remixed for single release, being at a quicker tempo than the original. Additional hand claps were added throughout the song as well as some new instrumentation to the choruses.

The video is another part of Williams' tongue-in-cheek humor, making fun of himself and his affairs, featuring him as the guru of some sort of cult of pregnant women. He also has a kind of God look, him being the prophet. It was filmed by Vaughan Arnell near Cape Town, South Africa.

The song became Williams' first single not to make the top twenty in the United Kingdom when it peaked at number twenty-two, the single fell off the charts in just three weeks. Elsewhere, the single fared much better in the charts, making the top twenty in many countries.

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