“The One” is a song by Australian singer and songwriter Kylie taken from her tenth studio album, X. “The One” was written by Minogue, Richard Stannard, James Wiltshire, Russell Small, John Andersson, Johan Emmoth and Emma Holmgren, while production was handled by Stannard and Freemasons. The song was released by Parlophone in Europe and the United Kingdom, and by Warner Music in Australia and New Zealand. Originally the song was to be accompanied with a physical release to coincide with the UK leg of the KylieX2008 tour, but was released as digital-only instead becoming Minogue’s second digital single after “Over the Rainbow”.
After its completion, “The One” was mastered by Geoff Pesche and mixed by Ash Howes. The song was recorded in a studio, which was set up in Brighton, England, where other songs (including “In My Arms”) were recorded. Musically, the album version is a Europop, electronica and electropop-influenced song. However, the remix version of the song is a more uptempo dance-pop song. According to the music sheet at MusicNotes.com, which was published by Sony/ATV Music Publishing, the song is written in the key of D major.