TikTok has become a hotbed for beauty trends, with users sharing their favorite products and routines. Lip serums, in particular, have seen a surge in popularity on the platform. Here are a few that have gone viral:

1. Too Faced Lip Injection Extreme: This lip plumper has been a favorite among TikTok users for its instant plumping effect. It contains a blend of potent ingredients, including Vitamin E and collagen, which help to hydrate and volumize the lips.

2. Glow Recipe Watermelon Glow Lip Pop: This multi-purpose product acts as a scrub, balm, and tint. It's packed with watermelon extract, coconut sugar, and flower-derived AHA, which exfoliate and hydrate the lips while adding a subtle pink tint.

3. Laneige Lip Sleeping Mask: This overnight lip mask has been a hit on TikTok for its intense moisturizing properties. It contains a mix of antioxidants and hyaluronic acid that work together to soften and repair dry, chapped lips.

4. Fenty Beauty Pro Kiss'r Luscious Lip Balm: This lip balm by Rihanna's Fenty Beauty has been praised for its lightweight, non-sticky formula. It contains shea and mango seed butters, which provide deep hydration and make the lips look fuller and smoother.

5. The Ordinary Hyaluronic Acid 2% + B5: While not a lip serum per se, this product has been used by many TikTok users for lip care. The hyaluronic acid in the formula helps to retain moisture, while the B5 provides surface hydration.

Remember, while these products have been popular on TikTok, it's always important to do your own research and consider your skin type and needs before trying out new products.