clipped from: www.prevention.com   
The tools you need to apply makeup like a pro

QuestionEvery company seems to have a dozen brushes. Which do I really need?
QuestionThese four: (1) A concealer brush to camouflage hard-to-reach spots like the inner corners of your eyes. (2) A blush brush--its wide, rounded shape deposits the perfect dose of powder blush. (3) An angled brush with a stiff head for applying eyeliner so the line isn't too thick or thin. You can also use this brush to apply a soft coat of brow powder to shape and fill in arches. (4) A shadow brush helps you add definition to droopy lids. Choose brushes that feel comfortable in your hand--that way, you can wield them like a pro.