This Saturday on X Factor Jamie Archer was the star of the week.

He sang the Kings Of Leon hit “Sex On Fire”, which even had Simon Cowell singing along.

Cheryl Cole was gorgeous as always.

We saw her wearing her Louis Vuitton skirt and her Camilla & Marc striped skirt.

We also saw her wearing a white embellished Matthew Williamson Fall 2009 dress at the Birmingham auditions.

Cheryl wore many Matthew Williamson pieces last season, so we should expect to see her in more pieces from his collection as his young vibrant looks suit Cheryl’s bubbly personality.

The dress is not yet available online, but it is available Matthew Williamson’s boutique’s.

Credit: Style.com & X Factor