Mamamia’s Tried and Tested series is your review of the latest to hit our desks in beauty, health and wellness. You won’t find any #sponsored content here, just honest, relatable and independent advice. This week, Mamamia's beauty editor Erin Docherty tries the latest celebrity makeup hack.

My lips. They're the width of shoelaces.

They are! They really are.

And don't get me wrong - I think they suit my face perfectly. It's just thatsometimes... I wish they could look a smidge plumper. Juicer. Actually look good with lipstick.

Because y'see, even when I line them and slap on a touch of colour, they just kind of... disappear when I smile.

So when I saw celebrity makeup artist Mary Phillips share her hack for applying lip liner and lipstick - the same technique she uses on Kendall Jenner, Hailey Bieber and Jennifer Lopez - I had to try it.

Because their makeup looks are always absolute perfection (see: below) - but it's their infamous plump lips everyone is always talking about.

In a recent TikTok video by Phillips, the LA-based makeup artist shared her nifty trick to nailing perfectly plump lips - minus filler.

But first, remember that time I tried... lube as primer? Post continues below.

Here's everything you need to know about the latest celebrity lip liner technique, and my honest review on it.

What is Mary Phillips' lip liner hack?

In the caption of her video, Phillips writes, "The lip liner technique I prefer to use! Everyone has a different preference and that's OK."

Yessss, Mary. So much yes.

Taking us through her technique step-by-step, Phillips explains: "I like to begin in the corners of my mouth and I start right outside the natural lip line. But this is where I stay the closest to the actual lip line.

"And just extend it [the lip line] slightly at the very top and at the very bottom of the lower lip," she says while lining around the borders of her lips.

Her liner of choice? " Giorgio Armani lip pencil in 12."

While it doesn't look like this is available anymore (sad face), in the comments, Phillips suggests Charlotte Tilbury Lip Cheat Lip Liner in Pillow Talk, $32, as a great alternative.

She also says to "enhance the cupid's bow following the natural shape of the upper lip" by taking the lip liner up a "little bit higher", then adds a touch of concealer with a makeup brush to smooth the edges.

"I take a soft brush and just smooth it out so that there's no really hard line visible. Then I take a little bit of concealer on a concealer brush and just make sure everything is nice and clean," she says.

To finish, she applies a liquid gloss - SUQQU Flawless Lip Gloss in 02.

Here's what it looks like, c/o Mary Phillips:

Isn't it pretty? Big Kendall Jenner vibes.

Now to put it to the test.

My honest review.

Let's do it!

After watching Phillips' technique, and telling myself it looked like a total cinch, I pulled together a tight little squad of products - a lip liner, a glossy lipstick, a liquid concealer, some brushes and a mirror.

I used