But the eagle-eyed would have spotted it both on and off the runway - Chanel's new Rouge Coco Stylo and Le Duo Vernis Longue Tenue are what all the cool kids on the streets of Paris Fashion Week are wearing. Why? Because new season colours matched with high-tech formulas make a combination that's impossible to resist.

The lipstick combo all the models are wearing this show season

Matching your lips to your fingernails may seem like an old-fashioned concept, but when you're dealing in the riot of colour seen on the runways, it's a smart move. Rouge Coco Stylo takes the best of both lipstick, gloss and balm for a highly pigmented, high-gloss finish with hydrating properties - no smudging or feathering, and no dried-out texture. Unlike a traditional lipstick, the ingenius Stylo pen is non-retractable - click once for just the right amount of product.

The nail offering is what really has us on the edge of our seats - 15 new season colours designed to be coated with the brand new Le Gel Coat - an ultra-glossy, longwearing topcoat that promises six days of gorgeous, chip-free nails, sans the UV lamp. Check out how both the lippie and the lacquer wear in Chanel's rockstar campaign vid above.

The lipstick combo all the models are wearing this show season