Netta Barzilai of Israel wins Eurovision with a chicken dance

“Fuego” is about “the power of women,” Ms. Foureira said in an interview before the final. “Nothing can put you down. So you need to just go up and fly, fly, fly,” she added, echoing her song’s lyrics.

Cesár Sampson of Austria finished in a surprising third place with his comparatively mellow pop song “Nobody but You.”

A carnival of high camp, Eurovision draws some 200 million viewers each year. Most winners do not go on to global fame — notable exceptions are Celine Dion, who represented Switzerland in 1988, and Abba, who sang for Sweden in 1974 — but they can still command a passionate cult following.

Winners are determined through a combination of juries and viewer votes, and each competition is hosted in the home country of the previous winner. (Salvador Sobral of Portugal won in 2017 with his ballad “Amar Pelos Dois.”)

This year, 43 entrants were whittled down into 26 finalists, who performed at Altice Arena in Lisbon. The contest is open to members of the European Broadcasting Union, which includes countries across Europe as well as Israel and Australia.

Offered the chance to perform again, SuRie declined, according to a statement from a BBC spokeswoman: “SuRie and her team are extremely proud of her performance and have together decided that there is absolutely no reason to perform the song again.”

The European Broadcasting Union forbids politically tinged performances, but politics tend to follow the competition nonetheless. Last year, Russia dropped out because of a continuing tensions with the host country, Ukraine.

This year, China did not show the contest after a Chinese broadcaster censored the semifinal performance of Ireland’s Ryan O’Shaughnessy, which showed two men dancing with each other to his ballad “Together.” In response, the European Broadcasting Union banned the channel, Mango TV, from broadcasting the second semifinal and final, saying in a statement that the censorship was “not in line” with its “values of universality and inclusivity.”

The sound effects in “Toy,” the song that won this year’s contest, have their origins in Ms. Barzilai’s childhood.

The beatboxing, she said, came from being bullied: “I was fat, and I was teased, and I had to find my thing.” And the chicken noises represent how bullying is about fear: “Fear of something different. Fear of somebody taking your place.”