Taylor Swift's red-lip secret revealed

Taylor is seen applying her trademark red-lip in the video. / Apple Music

It’s a blink and you’ll miss it moment, but Taylor Swift has revealed some telling secrets about her trademark red-lip in an ad for Apple Music.

The clip, which was released on Monday, sees the 26-year-old dancing around a bathroom singing to Jimmy Eat World as she prepares for a night out.

American website Refinery 29 has analysed the ad in an attempt to work out what products the starlet is seen applying to her pout.

The site’s Taylor Bryant writes: “She uses a brush to apply the crimson hue (which appears to be a regular ol' angled paintbrush, a hack that many makeup artists swear by), and then layers on two different shades — one of which appears to be from Lipstick Queen's Velvet Rope collection, judging by the golden tube. The other bullet looks like a toss-up between a red shade from NARS' Pure Matte Lipstick line, Surratt Beauty's Automatique Lip Crayon, and Bite Beauty's Matte Crème Lip Crayon. Before smacking her lips together, she uses them to lip-sync rather aggressively to popular middle school songs. So, basically, she's all of us.”

Taylor is seen grooving to Jimmy Eat World in the clip. / Apple Music

Swift has opened up about her lipstick choices in the past, telling Teen Vogue she’s a fan of MAC's Ruby Woo and NARS' Dragon Girl Velvet Matte Lip Pencil.

There are entire blog posts and reddit threads devoted to finding the secret to the Grammy-winner's scarlet lips - and it looks like fans are one step closer to mimicking the look.