There are a few "sure thing" makeup tricks that make everyone look instantly ravishing: False lashes are one. Red lipstick is another. But for our money, the most reliably sexy beauty trick is "cat eye" liquid eyeliner--ie, a thick line traced along the top lashline, winged out at the outer corners. It instantly opens up the eye--no matter the shape or size--and gives your face a glamorous, Audrey Hepburn chic-ness. The only problem? Applying liquid liner can seem like a daunting task if you've never tried it. Here, we asked celebrity makeup artist Nalo Jones to give us tips on how to create a perfect 'cat eye' liquid liner look.