"I Just Wanna Know" is the debut single written and produced by English singer and songwriter Taio Cruz. "I Just Wanna Know" was released as the lead single from Cruz's debut studio album Departure (2008). The single was released on 4 November 2006, via digital download, and two days later physically. It charted on the UK Singles Chart at #29. Despite having a lower peak position than his second single, "Moving On", "I Just Wanna Know" managed six weeks inside the UK top 75 compared to the four weeks "Moving On" charted for. The single is the only of Cruz's releases to be made available on two physical single formats. The B-side, "Backseat Love", features rapper Erick Sermon.

Jacob Taio Cruz, better known professionally as Taio Cruz, is an English singer-songwriter from London, currently based in Los Angeles. In 2008, he released his debut album Departure, which he wrote, arranged and produced. The album achieved certified gold status in the United Kingdom and earned him a Music of Black Origin Awards (MOBO) nomination.