On Saturday night, Tulisa paired her midnight blue gown with a matching statement necklace and peep-toe heels, while Nicole opted for a sheer LBD, with a missing sleeve.
On Sunday, the girls stepped things up a level in strapless mini dresses. Tulisa braved a bright pink number paired with matching lipstick and lace-up heels but Nicole went for gold in a metallic design and a glossy, berry pout. So who got their looks right on week one?
Let us know which judge's style you prefer by voting in the poll and see more highlights from X Factor 2012 in the gallery below:
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Mel B on the second day of Manchester auditions
Tulisa on the second day of Manchester auditions
Mel B at the first round of Manchester auditions
Tulisa on the first day of Manchester auditions
The X Factor 2012
Nicole Scherzinger at day three of the London auditions
The X Factor 2012
Gary Barlow, Tulisa, Nicole Scherzinger and Louis Walsh on day three of the London auditions
The X Factor 2012
Leona Lewis & Tulisa on day two of the London auditions
The X Factor 2012
Gary Barlow, Louis Walsh, Tulisa & guest judge Leona Lewis during the London auditions
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