 The lyrics of "Eternity" were written as a tribute to Williams' close friendship with Geri Halliwell and was the 20th best selling single of 2001 in the UK.Brian May plays guitar on the track.Though "Eternity" never appeared on a Robbie Williams studio album, a comedic snippet of the song can be heard in "Outtakes", a hidden track on "Swing When You're Winning".