Endah Cakrawati, 30, and her partner, Peter Lynch, 52, died after the plane they were flying in nose-dived into a river in front of thousands of horrified on-lookers watched the incident.
The 30-year-old posted a video on Instagram of her final moments inside the cockpit of the doomed plane moments before the fatal crash.
Ms Cakrawati can be heard saying, “wish me luck”, as she wishes her social media followers “happy Australia day” during take-off.
“We’re in Perth and we are ready to go for Skyworks today. Happy Australia Day,” she said.
The victim shared a video moments before she died in the crash
The plane, piloted by Mr Lynch, was part of the Skyworks airshow, in Perth, to celebrate the national holiday.
The couple died moments after the video was shared online when the Grumman G-73 seaplane plunged nose first into the Swan River in front of around 60,000 horrified spectators.
The aircraft is thought to have been following another stunt plane that had performed a similar maneuver seconds before.
However, the plane is reported to have stalled before plunging into the river and breaking in two.
The incident was witnessed by around 60,000 Australia Day revellers
Witness Lloyd Douglas told ABC News he was on a nearby boat when the plane smashed into the water.
He said: “As he banked left he seemed to go further to the left… and lose forward momentum and lost altitude fairly quickly.
“My concern was that he’d landed in amongst the small boats up at the east end of the Perth water.
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“I don’t think – looking through binoculars – that he did hit other boats.
“It did hit the water with a fairly decent force, and goodness, if it had another boat in the water or something it would be a tragedy.”
Police have now removed the plane’s fuel tanks from the water as they investigate the cause of the crash.
After the crash Commissioner, Brown told ABC News: “Firstly we have a scene out here which will be subjected to both coronial and a CASA investigation.
“It’s really important that we preserve that scene to make sure that we can extract everything we can find out why this tragic event occurred.”
Meanwhile, friends and colleagues of the pair have paid tribute after the tragic crash claimed the couple’s lives.
Friends in Indonesia paid tribute to Ms Cakrawati, one friend wrote: “Rest in peace, my beautiful friend… Still proud of you.”
Another wrote: “Rest in peace my dearest friend.”
Mr Lynch’s employer, Fortescue chief, Nev Power said: “Peter was a great mate and all of us at Fortescue convey our deepest condolences to his family, including his three children, and Endah’s family.”