Uber smart (as in Harvard-trained) dermatologist Dr Karyn Grossman can take credit for creating a jungle of skin care products made for grownup girl skin. Ohh, and she's not too bad at customised foundation, eyeshadow and lipstick, either. But don't be fooled by the playful names, this is serious stuff. Kirsten Dunst is addicted to Prescriptives. As far as addictions go.... It's a toss up between the (famous) Custom Blend foundation, False eyelashes mascara and the spooky texture of the Liquid Powder Translucent Powder. Nothing helps you "Create your own definition of beauty" quite like a bottle of bespoke foundation