Welcome back to FabSugar's detailed look at make-up brushes. Today's installment: luscious lip brushes. (To read the other installments, click here.) When buying a lip brush, it's important to look for a soft, delicate tip that allows for precision but that is also gentle on your lips. As with most make-up tools, natural bristles are best here.

To apply, wipe the front and back of your brush over your lipstick until it's saturated with color. Start in the middle and blend outward, and work only inside of your lip line when applying red or deep lips. Blend your line as the very last step. If you are applying gloss, make sure you start off with a light hand so it doesn't goop. Here are my picks for the best lip brushes.

MAC's #306 Lip Brush is made specifically for pro-styling. The flat, square tip allows you to load your lips with color, and it blends incredibly well. Buy it here for $16.50.

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Scott Barnes Retractable Lip Brush is made from sable hair. The coolest part about this brush is that it's retractable, so it expands and contracts from the center and won't cause a goopy mess. Buy it here for $22.

The Chantecaille Gloss Brush is super handy for travel. The tip is made of luxurious sable the handle has a beautiful pale ivory finish. This brush is both firm and soft for the best possible application. Buy it here for $28.

Beloved make-up master Kevyn Aucoin also makes a fabulous retractable lip brush for fool-proof precision. You can buy it here for $25. Or, when you buy one of his lip pots, you get a smaller version of the brush free!