The final five X Factor finalists have nowhere to hide on tonight's show as they tackle two songs each - one chosen by the unforgiving public, and one by some of the UK's top artists.
Unsurprisingly, the public chose Hero by Mariah Carey for ballad king Andrea Faustini whilst they chose Ed Sheeran's Thinking Out Loud for rocker Ben.
Fleur will tackle Alicia Keys' If I Ain't Got You, Lauren got Don't You Worry Child by Swedish House Mafia and Stereo Kicks will sing Run by Snow Patrol.
The songs chosen by the music artists may stretch their talents even further.
Crooner Sam Smith chose a song for Andrea Faustini, One Direction chose for Ben Haenow, Emeli Sande chose for Fleur East, Little Mix chose for Lauren Platt a song and Stereo Kicks' track was chosen by Tulisa Contostavlos.
Here's the list:
Andrea – Chandelier by Sia, chosen by Sam Smith
”I worked with Sia about 6 months ago and I remember being in the booth with her and her voice is just ridiculous, and when I heard Andrea’s voice for the first time I remember feeling that same kind of reaction," says Sam.
"The song is so difficult to sing but I genuinely from my heart think Andrea can do this. This is a huge, huge challenge and I think you’ve got to challenge yourself. Everyone I know loves that song, and everyone I know loves Andrea."
Ben - Come Together by The Beatles, chosen by One Direction.
“We thought it was a really obvious choice for Ben, Come Together by The Beatles. We think he could really own it and his voice has the perfect tone for a song like that. We know he will smash it!” they said.
Fleur - A Fool In Love by Tina Turner, chosen by Emeli Sandé
“Fleur’s voice is absolutely designed for a song like this, she can carry it so should be as soulful as possible; because when you dig the soul out it connects with people unlike anything else," says Emeli. "I know she will do it some proper justice and I wish her the best of luck.”
Lauren - Clarity by Zedd, chosen by Little Mix
“We thought hard about the kind of artist that Lauren is and what kind of song would really show off her voice, and Clarity was the one we landed on," said the girls. "Lauren has made the public fall in love with her, so she just needs to keep doing what she is doing.”
Stereo Kicks - Just The Way You Are by Bruno Mars, chosen by Tulisa Contostavlos
Tulisa says; “I'm proud to be part of the X Factor family and I'm very excited to be involved this year. I was more than happy to help my Lou Lou out and nominate a song for Stereo Kicks to perform. I think the boys are brilliant and can’t wait to see what they do with the song on Saturday night’s show."
The X Factor airs tonight at 8pm on TV3 and ITV.