XFactor 2012 star Ella Henderson tackled Grease track You're The One That I Want on tonight's show.
The 16-year-old took the John Travolta & Olivia Newton-John duet and spun it into a completely different track.
The slowed down ballad version of the track mesmerised the judges, as the final six acts all performed their guilty pleasures.
Nicole Scherzinger said: "Well... for me, my favourite performance from you this entire series had been Cher's Believe. It didn't touch me like that but it just goes to show how special you are, I didn't like the song choice but your voice sounded glorious. You look like a golden godness, you're beyond your ears. You have so much fire."
Gary Barlow gushed: "We're four weeks from the final and that was your best performance to date by far. Although you put your own twist on the song you always engage me and stay truthful to the song. A perfect performance."
Louis Walsh said: "What an amazing song choice, I loved the way you changed the whole thing, that was electrifying! You're going to sell millions and millions of records, I think you're amazing. That's the way to do it, you're going to be in the final."
Finally, Ella's mentor Tulisa Contostavlos said: "You made it sound current and absolutely beautiful, you're what this competition is all about, you're a little star."
Watch Ella singing You're The One That I Want on the X Factor below...
[cat c="the x factor"]The X Factor 2012[/cat] live shows continue tomorrow night on ITV1 with latest results show.
As well as another elimination, Sunday's show will feature performances from Olly Murs and Alicia Keys.