KATE Ceberano sings Advance Australia Fair at the AFL Grand Final. Courtesy Seven News

KATE Ceberano was nailing the Australian national anthem at the AFL grand final in Melbourne until she stumbled on a line that had Australian sports fans scratching their heads.

The Aussie pop queen was performing Advance Australia Fair in front of 100,000 fans at the MCG when she messed up the lyrics.

The worst part was, she was almost at the finish line.

Ceberano appeared to sing: “In history’s stage let every stage advance Australia fair”.

Here’s how it happened.

2015 AFL Grand Final at the MCG - Kate Ceberano singing the national anthem. #AFLGF http://t.co/VBU2Ch1uzA — 7 News Sydney (@7NewsSydney) October 3, 2015

Her blunder did not go unnoticed

I love you Kate Ceberano, but you only had one job. "In history's stage, let every stage".... Oh dear #AFLGF — Dave Thompson (@Thompson_Dave) October 3, 2015

@bencubby Kate Ceberano got the words wrong. In history's page... (not stage) — Mrs Havisham (@mrshavisham2) October 3, 2015

Kate Cebrano - learn the words love you're on national TV! — Stephen Pellatt (@PellattStephen) October 3, 2015

Did Kate Cebrano just forget the words to the national anthem? "History's stage"? #AFLGF — Tim Austin (@timaustin73) October 3, 2015

The ONE thing Kate Ceberano had to do was sing the first verse of the anthem, and she still managed to get it wrong. #AFLGF — Nathan Hall (@nthnhll) October 3, 2015

At least the attention immediately shifted away from Ceberano to the footy when the MCG’s sirens sounded immediately after she hit her final note.

Ceberano is also fortunate overseas popstar Ellie Goulding created headlines for a less than outstanding pre-match performance.

Incredibly, this was Ceberano’s second time singing the anthem at the AFL Grand Final.

The 48-year-old also performed the song at the 2002 decider between the Brisbane Lions and Collingwood.

“It’s such an honour and privilege to be asked to perform, I’m truly thrilled,” Ceberano said recently.

“I made my first Grand Final appearance in 2002 and feel very excited to have my daughter see her mum in the MCG singing our national anthem.”

She might not get a third crack.

She isn’t the only songstress to mess up a national anthem.

American prop icon Christina Aguilera was forced to apologise for muddling up the lines to The Star Spangled Banner during a live performance at the 2011 Super Bowl.

Aguilera blended in lines from different sections of the song.

Instead of singing “O’er the ramparts we watched, were so gallantly streaming” she improvised with “What so proudly we watched at the twilight’s last reaming.”

Earlier, Goulding added another chapter to the AFL Grand Final’s long list of entertainment busts after struggling to belt out her opening lines on the MCG pre-match entertainment stage.

The English songstress was accused of lip-synching on social media, while others blamed Channel 7 and the AFL’s pre-match entertainment setup for Goulding’s struggles at the start of her two-song set.

Opening her set with her track Love Me Like You Do from the movie 50 Shades of Grey, Goulding missed the right moment to begin singing over the top of her backing track or may have been unable to hear it.

The Channel 7 feed also appeared to struggle to pick up the live music from the performing music act, leaving a very awkward pause as fans waited for something to happen alongside the quiet background music behind Goulding’s track.

The moment did not go unnoticed by fans.

Goulding has responded by saying the feels flattered that fans believed her live singing was a backing track.

Love it when people think I lip sync, what a rad compliment :) Now where does one find a good veggie restaurant in Melbs? — Ellie Goulding (@elliegoulding) October 3, 2015