"Headlock" is a song by English singer-songwriter Imogen Heap, from her 2005 album Speak for Yourself.

It was the third single from Speak for Yourself, following "Hide and Seek" and "Goodnight and Go".

Remixed for radio as 'Immi's Radio mix' and accompanied by a new all-vocal B-side, titled "Mic Check".

"Headlock" debuted at number 74 on the United Kingdom's Singles Chart on 22 October 2006.

[2] After renewed interest in the song due to its association with the 2024 psychological horror video game Mouthwashing, the song charted at number 50 on the UK Independent Singles on 8 November 2024,[3][4][better source needed] and at number 100 on the Billboard Hot 100 in January 2025.