When celebrities share the beauty products they actually use, it feels like getting insider access to a glam squad secret.

But for L'Oréal fans, there's no question: The one thing they'll never be without is the L'Oréal Midnight Cream. “This is the reason I look like I slept eight hours and drank water,” one shopper says.

The secret to a perfect face is finding the right products, whether the latest big thing or a tried and tested classic. Here, Julia Carling presents the top products that really do the trick ...