"That's why I'm fighting to the end, just like he did".
"I know you're dad's up there, looking down on you, and he must be so, so proud", she said.
The performance earned a standing ovation from Mel B and Cowell.
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Evie dedicated many of her performances to her father and her audition to Christina Perri's 2011 song "Arms" was especially memorable.
Our thoughts and prayers go out to Evie and her family in this hard time and we wish her best of luck in the finale. "I'd rather stand tall", she sang, "then live on my knees/ 'Cause I am a conqueror, and I won't accept defeat".
Last week, Simon had revealed Evie's participation in the finale was uncertain, sharing with Extra, "We reached out to the family and [Evie] and said, 'It's your choice whether you want to come on the show or not.' If she doesn't, she definitely will be welcome to come on next year". I'm going to tell you how I respect you, how much strength you have. Because what you just did was lovely.
The winning act of season 11 will be crowned when NBC's America's Got Talent returns on Wednesday at 8 p.m. ET.