The 'Boomerang' singer showed off yet another gorgeous outfit – and that incredible figure! - as she arrived at Wembley Arena on Thursday morning (18 July).
Nicole teamed a fitted monochrome Finders Keepers dress with striking purple heels by Pedro Garcia and jewellery from Maria Francesca Pepe.
She chose her heels after seeking advice from her nearly four million Twitter followers, posting a picture of her enviable shoe collection and asking which people preferred.
Former Pussycat Doll Nicole kept her sunglasses on and left her voluminous, shiny hair loose for the ultimate in Hollywood cool. She wore Beauty Works Deluxe Clip-in Extensions in colour Raven.
Today's round of arena auditions marked the last ones before the boot camp stage of the 2013 auditions. For the first time, contestants had to pass two auditions to get to the next stage. First, they had to impress the judges in an intimate audition room, then in front of a crowd of thousands at Wembley.
Nicole was joined by fellow judges Sharon Osbourne, Louis Walsh and Gary Barlow, along with Xtra Factor presenters Caroline Flack and Matt Richardson.
X Factor returns later this year.
Can you remember all the X Factor winners? Remind yourself in our gallery below!
Copyright: WENN Harsha Gopal