"Here It Goes Again" is a song by OK Go and is the third released single (the fifth including radio-only singles) from the album Oh No. It was the band's only single to chart on the Billboard Hot 100 until "I Won't Let You Down" entered the Hot 100 in November 2014. Featuring the band dancing on treadmills, the video became a staple on YouTube; it was one of their most watched videos, with over 52 million views, until it was removed from their channel. In addition, the single peaked at number 36 on the UK Singles Chart on October 1, 2006, hence marking their second UK Top 40 single and their third UK Top 75 single.
Written by Damian Kulash Jr., the three-minute "Here It Goes Again" is set in common time at a "Moderately fast rock" tempo of 144 beats per minute. It is composed in the key of C major, with the vocal range spanning from C4 to A4. Kulash also sang and played the guitar in the original mix, which was produced by Tore Johansson with co-production done by Eric Drew Feldman, Howard Willing and Ken Sluiter. Andy Duncan was another guitarist on the track. Other instruments on the recording include drums performed by Dan Konopka and bass by Tim Nordwind. David Carlsson and Petter Lindgård were the song's engineers, with Jens Lindgård being the engineering assistant. Recorded at Gula Studion in Malmö, Sweden, it was mixed at The Village Recorder in Los Angeles by Dave Sardy, and finally mastered by Robert Vosgien at Capitol Mastering, also in Los Angeles.