"I Know" is a song by British record producer and DJ Shift K3Y. The song was released in the United Kingdom on 21 September 2014 as a digital download. The song peaked at number 25 on the UK Singles Chart. It was written and produced by Shift K3Y.
A music video to accompany the release of "I Know" was first released onto YouTube on 12 August 2014. The video has accumulated over thirty million views.