The enormous success of the Fire Fight Australia bushfire relief concert will go down as "an iconic moment in Australian history", says one of the artists who lit up the stage on Sunday.

Gamilaraay and Birri Gubba artist Mitch Tambo, who performed You're the Voice in his native language alongside John Farnham and Olivia Newton-John, said he was confident the benefit concert would be remembered as one of the great events in Australian music folklore.

Mitch Tambo brought a new twist to an old classic when he joined John Farnham for You're The Voice. Credit:AAP

"It was such a massive platform, how could it not go down in the history books?" he said. "This is an iconic moment in Australian history. This is going to be what future generations talk about … when a big portion of the nation is in need, we don't just sit back and let people suffer."

An all-star cast of musical acts wowed the sold-out crowd of 75,000 people who packed ANZ Stadium. The broadcast also delivered a television ratings boost to Seven with more than a million viewers tuning in nationally across the five city metro areas.