has always been an advocate of natural beauty, flaunting her red locks and fighting the corner for fair-skinned beauties
But now the Girls Aloud star has taken red hair to another level by ditching last month's copper toned bob in favour of extensions and a dazzling new shade of orange.
As Nicola left Zuma restaurant in London, her fiery red mane looked virtually neon.
What do you think of the singer's new look?
Check out more surprising star hairstyle transformations in the gallery below...