Marc Jacobs Beauty Highliner Liquid-Gel Eyeliner in Tw(Ink)Le, $39, available at sephora.com.au
She begins with a standard winged liner look. "I start in the middle of my lash line and start to paint out towards the edge of my eye. I flick out where I run into my crease, and [then I go in and] make that line bigger. I create a bit of a triangle, to get that point, and fatten it up in the crease, so my flaws don't show as much - I'm talking about right around here," she says, pointing to the area where crow's feet may appear if she wasn't blessed with the same exact skin she had in her Disney days.
Duff has a few tips when it comes to technique, too. "I try to press up against my lash line - many liquid liners start to dry fast, so instead of trying to push down and drag where you can actually lift the product and create a bare space, which is not good, press instead of [dragging]." Don't stress too much about symmetry, either. "Cat eyes go back to my theory of 'they can be cousins, not twins', because they're so hard to do," she admits. "As long as you have the right shape, no-one's going to be judging if it's spot on."
Okay, time for the trick. "I've always loved the little dot that people put as a focal point, down on your bottom lash line," she reveals. "You can do it with any colour - I've seen it in a few different colours, and obviously, editorially it looks really cool when you have a bare face and the dot, but that's not as realistic for daily use, so I played around with doing a little bit more of a full face of makeup, and then adding that dot as a cool focal point underneath."
"I'm going to choose one space," she says, applying a dot of liquid liner to the centre of her lower lash line, admitting that it won't look quite as bold once you've layered your other products: "it's going to stand out less when I add mascara," she confirms.
Once the liner is complete, it's onto lashes. Duff is clearly a fan of the cult-status Shu Uemura eyelash curler, reaching for it to give her lashes some lift.
Shu Uemura Eyelash Curler, $33, available at davidjones.com.au
She adds mascara (YSL's The Shock), offering the wand an, um, offbeat albeit glowing compliment - "this one's nice, it's kind of like a raggedy cat tail or something; it's fat and really gets your lashes nice and covered." Whatever works, right?
Duff finishes the look by adding a little definition over the dot. "I'm going to add a little bit of mascara on the bottom, but not trying to get every lash, just to darken them a little bit to add definition," she explains, noting that clumps are not encouraged: "I pick it off the ends so I don't have a spidery vibe, and if you have a little spoolie, they're great to comb through lashes."
And, voila - you're done. "I have my little dot - it's not super noticeable, but it does add a focal point that's kind of cool to draw attention to your eyes," she says. We agree - our newly dot-adorned eyes have hearts in them.
Yves Saint Laurent The Shock Mascara, $60, available at myer.com.au