The 16-year-old flies out to St Lucia with the other six remaining girls as they find out that the N-Dubz star will be mentoring them this year.
Joined by Tinie Tempah, Tulisa watches as Ella performs I Won't Give Up by Jason Mraz as the sunsets.
It seems to us that Tulisa even tries to hide a few tears behind her oversized sun glasses!
And Tinie reacts: "She is so good!"
But will it be enough to get Ella into the live shows next week?
The X Factor airs at 8PM tonight and 7:40PM tomorrow night on ITV1.
Watch [tag]Ella Henderson[/tag] singing I Won't Give Up at judges' houses below...