iiO (pronounced "eye-oh") was a New York City-based dance music act composed of singer and songwriter Nadia Ali and record producer Markus Moser. The group gained prominence for its 2001 single, "Rapture", which reached number two on the UK Singles Chart and the Billboard Hot Dance Club Play chart. Following the success of "Rapture", iiO released several singles and the studio album, Poetica in 2005. The album reached number 17 on the Billboard Top Electronic Albums chart.