The former Pussycat Doll star claims that she is in "awe" of the teenager after she covers Cher's 'Believe' for the judges.
"Today instead of just doing a song that I'd normally just go for and be like, 'Yeah, I can do that', I wanted to challenge myself a bit more and pick a song that was completely out of the box and out of my comfort zone," says Henderson, who performed a self-penned track at her first audition.
"I keep going through it in my head and trying to put my twist on it because it's so different from what I'd normally do. I really hope they like it."
After her Boot Camp audition, Gary Barlow claims that he would pay "lots of money" to hear her sing it again, while Scherzinger wipes away tears.
Speaking to his fellow judges, Barlow comments: "All of a sudden those lyrics meant something completely different."
A highly-emotional Scherzinger adds: "We can't touch her, we just have to be in awe of her. I'm done.
"You can't judge that, you just have to be honoured."
Henderson will find out if she has made the final 24 and Judges' Houses at the end of this evening's episode.
Watch Digital Spy's video interview with Ella Henderson:
The X Factor Boot Camp final airs tonight at 7.30pm on ITV1.
Photo Gallery - X Factor Boot Camp day two:
Copyright: THAMES TV/SYCO