"Hide and Seek" is a 2005 song written, produced, and performed by Imogen Heap. The song was released as the first single from her second album Speak for Yourself. The single was certified gold by the RIAA on 3 April 2009. Itself influenced by Paul Lansky's "Her Song", the track was later sampled in Jason Derulo's "Whatcha Say", a song receiving international success. As of 2009 the song has sold 647,000 copies in United States.

In a 2005 interview, Heap stated that the song's lyrics were ultimately about having painfully lost someone and how others react to things that happen to someone else.

The song is performed with the sole accompaniment of keyboard synth transformed by a vocoder, creating an altered a cappella sound.

The music video for the song was directed by Joel Peissing, featuring Heap singing against a gently flashing white backdrop. The video is presented in a heavily pillarboxed format.

Heap arranged an alternate version of the song, labeled "Hide and Seek 2", for the compilation album Songs for Tibet: The Art of Peace.

Canadian guitarist Antoine Dufour recorded a solo guitar version of the song. It is featured on his album "Convergences". British alternative rock band Fightstar covered the song as a B-Side to their single, "The English Way". This is performed solely by lead singer Charlie Simpson on vocals and piano. The Christian crunkcore band And Then There Were None has also covered the song. Additionally, English rock/folk artists The Dunwells recorded a guitar only version of the song with three-part harmony featuring vocalists Joseph Dunwell, his brother David Dunwell, and the band's drummer, Jonny Lamb singing counterpoint. It is featured on the band's 2012 EP Leaving of the Rose. British band Amber Run also recorded a cover of the song in 2012.

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