"I Know" is a song written and performed by American rapper Jay-Z and R&B singer Pharrell. Produced by Pharrell's production team The Neptunes, the song was released on November 4, 2007 as the third and final single from Jay-Z's tenth studio album, American Gangster.

The music video was leaked to the internet on Yahoo! Music on January 28, 2008. It premiered on Yahoo! on February 26, 2008.

The video (directed by Philip Andelman) features Zoë Kravitz playing multiple roles. The director described it as "a surreal, daydream-like blending of four separate and unrelated stories, four unique trips taken on by four girls in one night in New York City."

Each girl experiences a different "high" -- one, a seemingly well-to-do young woman, appears under the influence while in her apartment, another experiences the joy of love, another is taken with the beauty of the night sky in New York City to the confusion of her friends, and finally, the last young woman becomes "high" through music while at a night club.

This is Jay-Z's second music video in which he does not appear at all, counting the music video for "Wishing on a Star" (1998), which was only released in the UK.

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