With the 23-year-old aiming to turn the chair of at least one celebrity coach, she was ultimately given free rein to choose after all four Voice coaches turned their chairs for the Echuca singer.
With the next phase of the competition, the "battle rounds" looming, Walker decided she wanted to be mentored by Australian rocker Keith Urban, a family favourite of the Walker family.
“I didn’t expect four chairs, I was just hoping for one, any one,” Walker said when faced with her choice.
“The coach I’d like to go with is . . . Keith.”
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Walker was the fourth cab off the rank in the show's season 10 premiere on Sunday, with Australia first introduced to the country girl in a pre-recorded package.
"I live on farm with Mum and Dad; they do most of the hard work,” she said.
"I do lots of the fun stuff, I admit it; they call me the lazy farmer."
Before heading on stage to perform, Walker said she “had practiced like I’ve never won, and I’m going to perform like I’ve never lost”.
It paid off, with Jessica Mauboy the first to turn as soon as Walker hit the chorus, before Urban hit his button seconds later.
Guy Sebastian soon followed, before Walker really hit her stride, building up the song with some powerful high notes, which got the attention of fourth coach Rita Ora who finally turned her chair.
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Following Walker's performance, Urban thanked her for “doing what you just did”.
“Breaking it down to let the lyric be felt in another way and bring another focus to the story,” Urban said.
“For me the most important thing is not just hearing what you did, I felt what you did and the audience felt it.”
Jess Mauboy said she felt Walker was telling them her own story through song.
“It’s an Australian iconic anthem and everyone in this room and everyone watching was feeling that dynamic and that power,” Mauboy said.
“You definitely gave that song a whole other level of power, sister.”
Rita Ora said Walker was a “ready-made machine” before earnestly comparing her to an vegetable.
“We’re grateful to be able to watch a performance like that,” Ora said.
“For me, I think your vulnerability is your biggest power.
“You’re almost like an onion, like how they have layers; that’s what you are, you have so many layers.
“I think you are going to be so strong if you don’t ignore that amazing sensitive side of yourself.”
Guy Sebastian congratulated Walker for being “different and taking a risk” with her song choice.
“That’s how an audition should go,” Sebastian said.
“Because Men At Work have such an up-tempo triumphant pride, but to hear that pride still there in such a delicate version is really interesting to me.”
Walker now progresses to the battle round where she will go head-to-head with another member of Team Keith, with the winner to advance to the playoffs.
● The Voice blind auditions continue tonight on Channel 7 from 7.30 pm.
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