The X Factor judge, 38, looked absolutely sensational in an all leather ensemble as she headed The Chain of Hope Annual Ball at Grosvenor House in London.
Wearing her hair in eye-catching blue plaited top-knots, the singer channelled biker chic for the star-studded charity event, which helps to raise money for children with heart disease.
Flaunting her epic figure, Nicole’s fringed jacket and skintight leggings put her well on the map as a fashion icon as she posed up a storm for the cameras.
And wearing minimal make-up, the star looked like a million dollars as she pouted for photos, which was only emphasised with a pop of pink lipgloss.
But it seems all eyes were on the star’s epic blue hair – which is a shocking change from her usual all-brunette locks.
It’s not the first time the star has hit headlines for her antics on camera.
Just weeks ago, the brunette bombshell showed off her moves as she twerked for fans on Instagram.
After getting ready for the X Factor results show, the popstar proved how much she loved her outfit by dancing around.
Shaking her booty to Don’t Mind by Kent Jones, the Run singer started off the sexy routine by herself.
But by the next clip she was joined by a friend who seemed to be just as into the music as she was.
And by the time the third video was shared on the app, the American was shaking her assets accompanied by three pals.
At one point the former Pussycat Dolls member hid her face behind a leather jacket hanging from the wall as she moved her hips.
The girls then joined the rest of the stunner’s team, forcing an embarrassed woman to cover her face as they tried to get her to join in.
Just last week, Nicole showed off another side to her sassy self after hitting out at an X Factor viewer for slating one of her acts, Ryan Lawrie.
Choosing to speak to Louis in the call-in, caller Michelle from Harlow said: “My question is for Louis.
“Last night we saw Ryan perform in a pub for about ten people. Is that going to be the same amount of records he’ll sell if he ever releases an album?”
Ryan was visibly shocked by the comment, no doubt pleased his mentor stepped in to have his back.