In the final, "Je ne sais quoi" performed by Björk emerged as the winner exclusively through public televoting.

Promotional activities for the entry included the release of a music video and album and performances of the song in Norway and at the UKeurovision Preview Party in London.

Since the introduction of a semi-final to the format of the Eurovision Song Contest in 2004, Iceland has, to this point, only failed to qualify to the final three times.

[2] Since 2006, Iceland has used a national final to select their entry for the Eurovision Song Contest, a method that continued for their 2010 participation.

[a] Söngvakeppni Sjónvarpsins 2010 was the national final format developed by RÚV to select Iceland's entry for the Eurovision Song Contest 2010.

[6] On 9 September 2009, RÚV opened the submission period for interested songwriters to submit their entries until the deadline on 5 October 2009.

After a first round of televoting, "Je ne sais quoi" performed by Hera Björk and "One More Day" by Jógvan Hansen were selected to go against each other for a "superfinal".

The winner of the two, selected solely by televoting, was "Je ne sais quoi"; the placings of the other four songs were not revealed.

[14][15] Björk's prior Eurovision exposure included providing backing vocals for the Icelandic entries in 2008 and 2009, and placing second in Denmark's 2009 national final Dansk Melodi Grand Prix 2009 with the song "Someday".

[16] "Je ne sais quoi" was cowritten by Björk and Örlygur Smári, the latter of whom had previously written Eurovision entries for Iceland in 1997, 2000 and 2008.

[23] In an interview with ESC Radio, Björk noted that the ongoing eruption of the Eyjafjallajökull volcano at the time brought additional awareness to Iceland, and indirectly to her entry.

[24] The Eurovision Song Contest 2010 took place at Telenor Arena in Oslo, Norway, and consisted of two semi-finals held on 25 and 27 May, respectively, and the final on 29 May 2010.

[29] The running order for the semi-finals was decided through another draw on 23 March 2010 with the nation set to perform last (17th), following the entry from Belarus.

The stage backdrop displayed a starry night sky with a purple hue which later transitioned into blue, red and yellow pulsating lights with quick flickering intervals.

This jury judged each entry based on: vocal capacity; the stage performance; the song's composition and originality; and the overall impression by the act.

In addition, no member of a national jury was permitted to be related in any way to any of the competing acts in such a way that they cannot vote impartially and independently.