(Cover) - EN Star Style - Kristofer Buckle has revealed how he creates Christina Aguileras doll mouth.

The make-up guru has worked with a host of the worlds most beautiful women, ranging from Rene Zellweger and Jennifer Lopez to Christina Aguilera.

Kristofer loves working with Christina, and has offered an insight into how he enhances the stars iconic pout using a particularly powerful lipstick.

I use a product called LipSense and the colour I have used on Christina is called Blu-Red. It's literally like car paint. It's liquid so you apply it with a wand and it goes on like paint and it doesn't have any drag to it, so it creates this perfectly gorgeous doll mouth, he explained.

It dries completely with no moisture to it and then you apply a topcoat with just moisture. It doesn't move."

The beauty expert has warned ladies to tread carefully when trying to recreate stunning Christinas look though. He says the best way to avoid mishaps is by applying a good lip liner first.

"I use NARS Jungle Red lip liner," he divulged to StyleList. "I love that red. It's a good texture so you get a nice sharp edge. Red is so tricky because it can be messy and it can bleed. (C) Cover Media