Iceland was represented by Jónsi, with the song "Heaven", at the 2004 Eurovision Song Contest final, which took place on 15 May in Istanbul. For the first time since 1999, the song was chosen internally by Icelandic broadcaster RÚV. Jónsi was a member of the band Í Svörtum Fötum, and one of Iceland's most popular male singers.

2004 saw the introduction of the semi-final system into Eurovision. However, Birgitta Haukdal's 8th place finish in 2003 meant that Iceland was given one of the ten automatic qualifying spots in the 2004 final. On the night of the final Jónsi performed 17th in the running order, following Greece and preceding Ireland. At the close of voting "Heaven" had received 16 points, placing Iceland 19th of the 24 entries. The 12 points from the Icelandic televote were awarded to contest winners Ukraine. Iceland's low placement saw them relegated to the semi-final for 2005.

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