Jazz ballads do not usually win Eurovision, at least in modern times, but Salvador Sobral - and his sister Luisa, who wrote Amar Pelos Dois - came up with a deceptively simple song that relied on Salvador's effortless vocals.
Salvador Sobral, 27, won with his ballad Amar Pelos Dois, which was written by his sister.
Sobral first performed his winning ballad bare-bones, stripped of numerous larger-than-life on-stage (and off-stage) treatments associated with Eurovision.
Ukraine took first place in 2016 when the country's entry struck a surprise gold with "1944", a song that featured lyrics about deportations by the Soviet Union.
Runner-up Kristian Kostov of Bulgaria wasn't short on feeling.
Ukraine won last year's Eurovision with its Crimean Tatar entry Jamala.
Russian singer Yulia Samoylova performed in Crimea again on Tuesday, coinciding with the first Eurovision semi-final.
Kiev barred Russia's singer Yuliya Samoilova because she had illegally entered Crimea to perform there after Moscow's disputed annexation of the peninsula from Ukraine.
Italy was the favourite to win, but only came sixth.
He had previous experience at Eurovision, having been a backup singer for the Israeli entrants Nadav Guedj in 2015 and Hovi Star a year ago in Stockholm.
Eurovision 2017 was fraught with controversy from the moment Ukraine was announced the victor in 2016.
"I just wanted to sing a attractive song as it is - it's in Portugese", he said of his decision to sing in his native language despite speaking fluent English.
Ukraine is hosting the competition while the country is fighting a war, hundreds of kilometers away in the east, against Russian-backed separatists, after its Crimean Tatar entry Jamala won the competition a year ago.
"If I can bring some sort of change to the pop music in the world in general, because people only listen to the music that is thrown at us from the radio stations, I'll be more than happy".
We've also finished last in three contests over the years.
In response, Russia's state-owned Channel 1 television refused to broadcast the contest, replacing Saturday's final with a screening of the film "Alien".
The acrimony is ironic because Eurovision was founded in 1956 to bring European countries that had been at war a little over a decade earlier, together.
Russian Federation responded by refusing to air the contest and viewers in separatist eastern Ukraine were also unable to watch.
The contest, which aired in the USA on Logo, has launched the careers of the likes of ABBA, Celine Dion, Julio Iglesias, and Olivia Newton-John since its inception in 1956.