The reality show star must have swapped notes with host Laura Whitmore, as both went for the monochrome trend at Somerset House on Wednesday evening (4 September).
However, stylish Rosie added a splash of colour to her ensemble, accessorising with a bright blue bag and necklace.
We love Rosie's faux-leather skirt, a very chic way of rocking this A/W's grunge trend. Better yet, you can get the look on the high-street, as her Split Lucille Leather Skirt is available from All Saints, though it will set you back £198.
The fashion blogger teamed her asymmetric skirt with a black and white shirt and pointed white heels, keeping with the monochrome theme to make her accessories stand out.