Speaking to Breitbart News the day Madonna arrived in Israel last week, Adams predicted her appearance at the song contest would make for the "best Eurovision ever". At one point, members of Icelandic band Hatari waved scarves bearing the Palestinian flag at the camera as they waited to hear the scores awarded for their song.
The Israeli director of the Eurovision Song Contest on Sunday said organizers did not notice that dancers accompanying pop star Madonna during the competition final bore Israeli and Palestinian flags, which they controversially displayed to the audience while on stage.
The gesture was an apparent call for unity, but Eurovision organisers seek to keep all politics out of the event and the display of Palestinian flags inside Israel is deeply controversial. This element is an act that was not part of the rehearsals which were clarified by the European Broadcasting Union and host broadcaster Kan.
Hatari's song Hate Will Prevail, during which the leather- and latex-clad performers thrashed around a grenade-shaped globe as flames shot from the stage, came 10th of the 26 finalists.
The 60-year-old megastar began with an elaborate set resembling a church with choir singers wearing monks' robes.
A self-described worldwide agent, dancer, professor, head of state, housekeeper, equestrian, prisoner, student, mother, and nun, Madame X can now add "Eurovision performer" to her long list of occupations.
This year's competition was more political than usual, held against the backdrop of a campaign by the Boycott, Divestment, Sanctions (BDS) movement that urged artists, fans and broadcasters to shun the event to protest against Israeli policies in the West Bank and Gaza.
Israel's hosting duties were embraced by the country and received intensive coverage and attention in recent days.
Palestinians planned a simultaneous alternative event dubbed "Globalvision".
Iceland's entry Hatari had been expected to spark controversy.