The Seekers played a recording of an unreleased song by the band to honour lead singer Judith Durham in a state memorial in Melbourne.
The song, Carry Me, was written by band member Bruce Woodley and features Durham's vocals.
"This song is now our collective gift to share with you tonight as we celebrate Judith's magnificent gifts to us all," said band member Athol Guy.
"May it carry her safely on the rest of her journey."
Guy said the song was written for someone needing inner peace.
"That's probably the space that a lot of us are in as we're here tonight," he said.
Some of its lyrics included: "You're on your journey home, your words of wisdom come to me / Through all the years of doubt, the rhymes and harmony / All the secrets of the heart, I will miss your company."
The service also featured musical tributes from Durham's sister Beverley Sheehan, The Wiggles, Dami Im, David Campbell, Vika and Linda Bull and Deborah Cheetham.
Georgy Girl singer Durham died in Melbourne on August 5 at the age of 79 after complications from chronic lung disease.
Nephew speaks of Durham's 'strength' in death
Durham's nephew, Tony Sheehan, said he spoke on behalf of the family.
He said Durham's mother had a wish that her daughters would not be tone deaf.
"She got her wish," he said, to laughter from the audience.
He said Durham was always destined to be a musician, having told her sister during childhood "that one day, she'd sing on all the stages of the world".
He told a story of Durham's early foray into live music.
"In her teens, Judith was kind of naive," he said.
"Week after week, she turned up at the same jazz club and asked if she could sing a song with the band.
"Week after week the band leader said 'come back next week'."
He said when they eventually let her join in, they were blown away.
The band leader asked for her name, and she said Judith Cock — the name she was born with.
Mr Sheehan said Durham was told: "Look, if you're gonna be singing in public, you might want to think about changing your name."
"Oh really? I like Judith," he said she replied.
She later changed her name to Judith Durham, using her mother's maiden name.
On a more serious note, Mr Sheehan remembered his aunt as a deeply generous and optimistic person.
"Judith faced death as she faced everything: with calm and strength," he said.
"We will miss you but we are so proud of you."
Musical tributes from Beverley Sheehan, The Wiggles and Dami Im
The service featured a number of musical tributes, mainly hits from The Seekers.
Durham's older sister, singer Beverley Sheehan, recalled their shared love of music ever since childhood.
"We'd [sing together] early in the morning and my father would have to come in and say: 'that's enough, your mother can't sleep'," she said.
She performed The Jelly Bean Blues, accompanied by jazz band The Syncopators.
"This perhaps could be the hardest thing I've ever had to do," she said.
Her performance was followed by a broadcast of a medley of songs from The Seekers' 50th Anniversary Golden Jubilee Tour.
A video performance by The Wiggles of Morningtown Ride was broadcast through Hamer Hall.
Dami Im, 2013 winner of The X-Factor Australia, delivered a stirring performance of Colours of My Life.
'You're not really gone': The Seekers pay tribute to lead singer
Durham's surviving Seekers band mates Keith Potger, Bruce Woodley and Athol Guy spoke of their admiration for their lead singer.
"It's a real surreal experience for me, standing on this Hamer Hall stage without Judith," said Potger.
"We shared triumphs and adventures on this very platform.
"You're not really gone, because your picture is on my wall and your boundless spirit and love will be in my heart forever."
Bruce Woodley spoke of how Durham managed to go on stage while battling a serious lung disease through much of her career.
"Her bravery and single-mindedness in overcoming the enormous physical obstacles that life threw at her has always been an inspiration to me," he said.
"Quite often, the boys and I would hear her in her dressing room coughing her heart out a few minutes before a show and thinking to ourselves, 'there's no way she's going to sing tonight'.
"Wrong."
Athol Guy said the band hoped to have a party at Hamer Hall for their 60th anniversary in December as was initially planned.
He then introduced the band's final, unrecorded song, Carry Me.
"Here's our last song together," he said.
