Who: Tulisa Contostavlos and Nicole Scherzinger.
What: The battle for the most stylish X Factor judge continued last night as Tulisa and Nicole stepped on to the stage in completely different dresses.
While Tulisa went for girlie in a lilac sequin number by Jovani, Nicole opted for a sexy lady look in a strapless leather Ermanno Scervino frock with a pleated waist, teamed with Guiseppe Zanotti heels.
Verdict? Both pretty, but Nicole's gorgeous get-up just pips Tulisa's sheer chic to the post.
Now for more Tulisa looks: