Jess Glynne shocks Boy George and Kelly Rowland as she goes undercover for The Voice Australia audition

Jess Glynne left The Voice Australia audience and judges stunned as she auditioned for the show in the first round.

The award-winning artist, who is currently supporting the Spice Girls on their stadium tour, only had to sing one note of her hit I’ll Be There for the audience to realise who she was.

But the four judges - Boy George, Kelly Rowland, Delta Goodrem and Guy Sebastian – took slightly longer to fall in, before all simultaneously turning with the first high note.

The Karma Chameleon singer jumped to his feet and began dancing, with Rowland also up out of her seat for the rest of the performance.

Undercover: Jess Glynne decided to audition for The Voice Australia (Dave Benett)
Undercover: Jess Glynne decided to audition for The Voice Australia (Dave Benett)

After Glynne had finishing singing, Boy George joked: “I have to ask…Hello, what’s your name and where are you from?”

“I’m Jess,” the singer laughed before Rowland said: “We know that”.

Explaining why she was in Australia, Glynne said: “I’m doing some shows. A tour. Do you know what? When you’re there it’s mad scary.

“Whoever does this I’m, like, really proud. Big up, it’s scary!”

Glynne was then delighted to find out that a lot of the singers who have appeared on the show have been “inspired” by her, according to the panel.

Sebastian added: “'I keep using you as an example [to contestants] of voices that you just know. When you're on the radio you know it’s you. You sound like nobody else. I love your voice.”

After her four yeses, Glynne made sure to carry on the show’s traditional format and chose to work with Boy George as her mentor, had she been a genuine contestant, before hugging everyone and walking off stage.