'X Factor' Katie crumbles under pressure

The X Factor's Katie Waissel crumbles under the pressure during her performance at the Judges' Houses stage.

Speaking to category mentor Cheryl Cole and her assistant will.i.am, Katie tells them that she is unique and wants to be a "star" in everything from music to fashion to medicine.

She adds: "At the forefront of my mind is to go out there, focus and nail the song. I will be a star. I will do this. I will not take no for an answer."

After starting her rendition of 'Smile' by Lily Allen, Katie breaks down in tears. A concerned Cheryl asks: "What's wrong babe?"

"I’m so sorry, it’s an emotional song for me," Katie explains. "This is my last shot for you guys so can I just take a breath, I'm sorry."

Cheryl allows her to restart the song, which she successfully completes second time around. "Do you think stopping halfway through might have cost you?" host Dermot O'Leary asks outside.

"Um, I don't know," a nervous Katie replies.

Other songs performed in the Girls' category include Rebecca Ferguson's performance of 'Fireflys' by Owl City, Gamu Nhengu's rendition of 'Cry Me Out' by guest X Factor judge Pixie Lott and Keri Arrindell's alternative choice of 'Wake Me Up When September Ends' by Green Day.

The X Factor airs tonight at 7.05pm on ITV1.