Cheryl and Dannii's December 6 X Factor Dresses

Dannii Minogue and Cheryl Cole on Sunday night's Live X Factor show on December 6.

Cheryl went for dramatic glamour in a Stephane Rolland dress with mini cut at front and flowing fabric at the back. And Dannii, who like Cheryl has one act in the final, looked fab in a silver sequin covered Aurelio Costarella Spring 2010 dress.

The dress has previously been seen on model, and Dannii's fellow-Aussie star Jessica Hart.

Pics from chimology.org