Je ne sais quoi " is an Icelandic eurodance song composed by Örlygur Smári and Hera Björk and performed by Hera Björk , and was the Icelandic entry at the Eurovision Song Contest 2010 , held in Oslo , Norway on 25 , 27 and 29 May 2010 . The performance took place in the first semi-final on 25 May and was performed again in the final , four days later . The song is performed in English with some phrases in French ( namely the phrases " Je ne sais quoi , " '' I do n't know what '' , and " Je ne sais pas pourquoi , " '' I do n't know why '' ) . " Je ne sais quoi " was the winner of the Söngvakeppni Sjónvarpsins 2010 contest , organised by Icelandic broadcaster Ríkisútvarpið ( RÚV ) to select the Icelandic entry for the contest . Despite being one of the early favorites and the fans ' favorite to win the contest and finishing 3rd with 123 points in the semi-final , the song ended up finishing 19th with 41 points
Eurovision Song Contest 2010
Eurovision Song Contest 2010
Je ne sais quoi (song)