She was the one who started Australia's Eurovision journey in 2014, and Jessica Mauboy has now come full circle, competing in the grand final in Lisbon.

Mauboy — who sang Sea of Flags as a guest performer at half-time in the 2014 contest — gave it everything, performing in front of an excited crowd in the arena and a big global TV audience.

Singing We Got Love, the Australian star came 20th out of 26 entries at the big event.

Donning a purple sequinned dress "inspired by her dreamtime story", Mauboy was greeted by cheers from the crowd who sang along during her performance.

Despite the warm reception from the crowd, Mauboy received the lowest points in the tele-vote — Australia got just nine points from people phoning or texting their votes while watching the contest, after receiving 90 from the professional music juries.

Speaking after the contest, Mauboy said she felt "really celebrated", not sadness, at the end of Eurovision.

"I honestly felt like I gave it my all and sang my heart out," she said.

Sorry, this video has expired Australia's Jess Mauboy performs We Got Love in the grand final.

The contest was won by Netta Barzilai for Israel with Toy, giving her country its fourth Eurovision victory.

No country received the dreaded "nul points", with hosts Portugal finishing last of the 26 nations with 39 points.

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More than 10,000 people were in the audience, and thousands more watched the show at a downtown fan zone in Lisbon.

An expected 200 million people were tuned in across the world.

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Watch Duration: 3 minutes 4 seconds 3 m 4 s Israel's Netta Barzilai performs Toy.

The event started out as a competition between European countries, but its huge popularity has led to the inclusion of Israel and Australia — and previously Morocco — as contestants.

The bookmakers' favourites this year were Israel's Barzilai; Cypriot singer Eleni Foureira, with her fiery performance of Fuego; and France's Madame Monsieur with the politically charged Mercy, about migrants who risk their lives crossing the Mediterranean on unsafe boats hoping for a better life in Europe.

Sorry, this video has expired Madame Monsiey performs Mercy.

Sorry, this video has expired Cypriot singer Eleni Fouriera performs her dance track: Fuego.

Barzilai's up-tempo song Toy — featuring the lyrics "I am not your toy, you stupid boy" and "the Barbie's got something to say" — has been hailed as a song for the #MeToo movement.

"The song has an important message — the awakening of female power and social justice, wrapped in a colourful, happy vibe," Barzilai told a Eurovision blog this week.

Netta was overjoyed with her win, Israel's fourth-ever victory at Eurovision. ( AP: Armando Franca )

The Israeli performer was overcome with emotion when the penultimate televote score was announced for Cyprus, confirming that she had won the contest.

"Thank you so much for choosing different, thank you so much for celebrating differences between us," a tearful Netta said.

"Thank you so much for celebrating diversity! Thank you, I love my country! Next time in Jerusalem!"

Last year's winner, Salvador Sobral, who has been critical of Eurovision for what he called its focus on "fast-food" music, had slammed Israel's entry in an interview in the leadup to this year's contest.

He called Netta's entry a "horrible song", leading to an uncomfortable moment at the presentation, where he handed over the trophy to her and quickly left the stage.

The other controversy at the grand final involved United Kingdom entrant SuRie, who had a stage invader grab the microphone from her hand during her performance.

She recovered and grabbed it back before going on to finish the song. She was given the option of re-doing the song, but opted not to.

The United Kingdom — which has won the contest five times but not since 1997 — continued a run of poor results with a 24th placing on 48 points.

Organisers also released the results of the voting from the semi-finals, which showed that Australia finished fourth out of 18 countries in semi-final two on 212 points, behind the winner Norway (266).

The other semi-final confirmed the momentum for the two leading contenders, with Israel winning semi-final one with 283 points to Cyprus in second with 262.