TikTok's red lips theory in 2025: Why it's a bold, standout look and how to master it

A dash of red on her lips. Too much, she thought at first.

Hold that thought.

 It’s actually perfect.

Dubai-based Amrita Anandani swears by TikTok’s Red Lipstick theory, and for good reason. After steering clear of the colour for most of her life, a friend encouraged her to try it. Without makeup. “I thought that I would look like a joker. But now, I feel it’s become a part of my signature look,” she says.

There’s something bold about the red lipstick, and with the no make-up look. It’s understated, and yet says enough.

“Red lipstick is a source of strength,” Poppy King, the creator of Lipstick Queen had once said.  “You put it on and suddenly you feel more capable than you did without it.”  And, as Jessica B Matlin, a beauty editor and writer had once said: That’s the beauty about red lipstick. It’s the case of chicken and egg. It may require confidence to wear, but confidence can be a result of putting on red lipstick – and no one needs to know which comes first.

It's 2025, and the red lips trend, which has been just gaining momentum for the past few years, is showing no signs of slowing down. And celebrities, like Rihanna and Taylor Swift, just won't let it, with TikTok by their side.

After all, it's now the signature look.

The red lip theory

It's Rihanna who made waves with this flattering colour during her Met Gala appearances. One of her most iconic shades is RiRi Woo, a deep red with blue undertones. This particular shade became a huge hit for its ability to suit a wide range of skin tones, and Rihanna often paired it with a flawless complexion and minimal eye makeup for a classic, timeless look. She also embraces the glossy red lip, particularly during her appearances at more glamorous events. A notable look was when she wore a glossy, vibrant red during the 2018 Met Gala, which made her lips appear plump and luminous. This look is often paired with bold eye makeup, allowing her red lips to stand out as the focal point of the look.

This is the essence of the red lip theory, which has taken over platforms like TikTok. You don't need makeup for your lips to shine. One user confidently declares, "If you're wearing nothing but red lipstick, your skin feels more even." Another takes on the challenge, swiping red lipstick across her face and noting, “I’m not going to disagree with her. My skin does seem a lot clearer.”

Clearly, the right red lip has power—it makes a fiery statement. "The red lip theory suggests that wearing bold, striking lipstick can significantly boost a person’s confidence," explains Amayra Kaitlin, a makeup stylist based in Abu Dhabi. "It's a symbol of strength, assertiveness, and glamour, making someone feel empowered. It’s all about self-expression and standing out."

While some view it as a symbol of confidence and sophistication, others may see it as a statement of rebellion or defiance, depending on the context in which it's worn. Ultimately, the red lipstick theory is about using makeup to boost one's self-image and make a lasting impression.

How can we master the look?

Achieving the perfect red lip look, just like your favourite celebrities, is all about finding the right shade, prepping your lips, and applying with confidence. Take a page from iconic beauty moments, like Rihanna’s signature matte red or Taylor Swift’s classic crimson, and follow these simple steps to master your own show-stopping red lip, explains stylists Kaitlin and Namisha Gopalani, a makeup stylist.

Find your perfect shade: Not all reds are created equal. Celebrities like Kylie Jenner and Zendaya have shown that the key is choosing a red that complements your skin tone. Warm-toned skin looks great with reds that have orange or yellow undertones, while cool-toned skin shines with blue-based reds, just like the ones seen on Blake Lively or Scarlett Johansson.

Prep your lips: Smooth, hydrated lips are a must for a flawless red lip. Celebrities like Kim Kardashian swear by exfoliating and moisturising their lips before applying colour to make sure it lasts longer and looks picture-perfect. Exfoliate gently and apply a nourishing lip balm—then, you're good to go,

Use a lip liner: Take inspiration from Beyoncé’s perfectly defined pout. A lip liner is essential for creating clean lines and preventing feathering, ensuring your red lips stay flawless all day or night. Choose a liner that matches your lipstick, or go one step further with a deeper shade for added definition.

Apply the lipstick: Follow the lead of stars like Angelina Jolie, who always sports a red lip with precision. For a clean, precise application, use a lip brush to apply your lipstick, starting from the center and working outward. If you're in a rush, you can apply directly from the bullet, but make sure to stay within the lines.

Blot and set: To get a long-lasting look, make like Gigi Hadid and blot after the first coat, then apply a second layer. Setting your lips with translucent powder helps lock the color in place without sacrificing its boldness.

Confidence is key: Red lips are all about attitude. Just like Priyanka Chopra and Emma Stone, once you've got your red lips on, wear them with confidence. Whether you go for a minimal makeup look or a full glam, a red lip will always make you stand out.