Leading up to today's release of Radiohead's 20th anniversary expanded reissue OK Computer: OKNOTOK, the band shared videos for the two of three previously unreleased songs, "I Promise" and "Man of War." Now, the third song, "Lift," is finally available. You can listen to it above.

The three songs were not entirely new to fans, but had only been performed live and never released officially. The album also includes remasters of the original OK Computer record, as well as eight B-sides.

It's been a long run-up to the release, with Radiohead first hinting that something was coming in April, when mysterious posters began popping up in cities around the world. The move got fans speculating on Reddit about what the posters might signal, with many quickly and correctly foreseeing a 20th anniversary release for OK Computer. 

Radiohead collaborator Stanley Donwood helped stoke the mystery by posting on social media that an upcoming project is "soon to be real," followed by photos of scaffolding.

At the beginning of May, the band then posted a video of a child singing what seemed like alternate lyrics to "Climbing Up the Walls" with some retro graphics. Midway through, the words “Program: radiohead” appear at the top and, shortly thereafter, “0 OK, 0:1″ turn up at the bottom.

Yesterday, it was revealed that the reissue is dedicated to the memory of frontman Thom Yorke's late ex-partner, Dr. Rachel Owen.

Radiohead is currently midway through a month-long European tour. Guitarist Jonny Greenwood is doing double-duty and opening some dates with his side project Junun.

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