Anne Hathaway, 41, has gone viral on TikTok for sharing a simple beauty hack that uses a hairpin to achieve fuller lips by gently stimulating blood flow. The technique involves softly pressing the hairpin along the upper lip for no more than 30 seconds to avoid injury. Hathaway demonstrated the trick on the set of a Shiseido campaign, humorously noting that her crew gave her odd looks. The hack has resonated with many, earning praise and gratitude from followers who appreciate her straightforward advice. Hathaway's resurgence in the spotlight is also linked to the success of her new film, 'The Idea of You,' where she stars opposite Nicholas Galitzine.