The singer and former Pussycat Doll, 34, arrived for the third day of auditions in Manchester wearing a PVC-lined cropped top with embroidery and bead embellishments.
Teamed with a matching mini skirt, the outfit flaunted her washboard stomach and killer pins.
Despite the rainy British weather, Nicole chatted to fans and signed autographs on the red carpet outside the city's Trafford Centre.
Nicole's sexy outfit also impressed The Xtra Factor host Caroline Flack, who tweeted: "Nicole looks so beautiful today it's confusing my sexuality...."
We have to agree!
Do you like Nicole's outfit? Tell us below!
Watch Nicole's video for her single 'Boomerang' below: