Michael Rice has won the public vote to fly the flag for Great Britain at this year's Eurovision Song Contest in Tel Aviv.
The exuberant crowd cheered the singer with fans also feeling equally uplifted at the end of the performance.
Australia is a relatively recent entrant to the Eurovision Song Contest.
Speaking on Saturday night, Miller-Heidke said she was "so grateful and thrilled" to represent Australia at Eurovision.
But activists for the Palestinian-led worldwide Boycott, Divestment and Sanctions (BDS) movement have been calling on musicians and broadcasters to refuse to participate in this year's song contest as part of a broader campaign against Israel's occupation of Palestine.
"What an awesome performance".
Paul Clarke, the creative director of Eurovision - Australia Decides, describedMiller-Heidke's victory as "a win for out-of-the-box brilliance, which Eurovision devours".
"It's a standout song with mesmerising staging".
"Argh! Thank you so much for voting for me!"
The show flaunted Australian talent before the contenders even took to the stage. Australian Idol alum Casey Donovan started the show with her take on Guy Sebastian's Tonight Again, which Sebastian took to a #5 place at Eurovision in 2015.
Queensland Tourism Industry Development Minister Kate Jones said Kate will be getting a proud send-off.
"We were lucky to have just a taste of the global phenomenon that is Eurovision with Eurovision - Australia Decides on the Gold Coast".
The Eurovision finals and grand final are scheduled to be held at the Tel Aviv Convention Centre on 14, 16 and 18 May.
Jessica Mauboy performed at the event in 2014 as an interval act.
The night was full of impressive performances, but the singer who ultimately claimed the title of Australia's Next Top Eurovision Hope was 37-year-old Kate Miller-Heidke. Dami Im, who charged to a #2 finish at the 2016 contest, capped the show off with a solo piano performance of Sound Of Silence moments before the final announcement.