"What I've Done" is a song by American rock band Linkin Park. It was released as the first single from their third album, Minutes to Midnight. The song is composed in the key of G minor and is set in 4/4 time. The song was released as a radio single on April 1, 2007, as a digital download on April 2, and as a CD single on April 30. The live version of "What I've Done" from Road to Revolution: Live at Milton Keynes was nominated for Best Hard Rock Performance at the 52nd Grammy Awards, but did not win. It also serves as the main theme of Transformers and also appears on Transformers: The Album. The song was featured in the video game Guitar Hero World Tour. In January 2011, it was released in a Linkin Park DLC pack for Rock Band 3, along with a PRO mode update, which allows use of real instruments such as guitar, keyboards and electronic drumkits. The song is also a b-side to the UK single of "Iridescent". Chester Bennington described the track in a March 2007 interview with MTV: Joe [Hahn] came up to Mike and me and asked us to take the whole idea of Minutes to Midnight and apply that to how the band has changed. So, in a way, it's us saying goodbye to how we used to be...The lyrics in the first verse are 'In this farewell, there's no blood, there's no alibi,' and right away, you'll notice that the band sounds different: The drums are much more raw, the guitars are more raw and the vocals aren't tripled. It's just us out there .... and that's how Rick Rubin wanted it. The single and video appeared in the iTunes Store shortly after midnight EST on April 2, 2007. It became available the day after on iTunes in the UK and Australia. On April 2, the song was featured streaming on the front page of their official website, with the video being added to the site shortly thereafter. The song starts out with a short 3-second guitar part and then a piano motif, before adding a hip hop-inspired drum line, and then introducing a raw-sounding guitar riff. When the song is played live at Linkin Park's concerts, Mike Shinoda plays the piano intro and the guitar after that. This song differs from most of Linkin Park's songs from previous albums in that it features almost no lead vocals from vocalist Mike Shinoda, with the exception of a brief "na na na" refrain at the end. "What I've Done" was the last song written for Minutes to Midnight. The song also has a downbeat exactly once every second, consistent throughout its entirety. Mike Shinoda created a remix of the song, which is called "What I've Done (Distorted Remix)", which is included as a b-side to "Bleed It Out". The remix was then included in the international tour edition of Minutes to Midnight, as well as a track in the Linkin Park Underground-exclusive CD Undergound X: Demos. (wiki)