TikTok may have been in the U.S. before 2020, but it was a banner year for the video-sharing social media app. With more time than ever at home, people leaned into the app for both entertainment and inspiration. There was no shortage of TikTok beauty hacks, makeup transformations, and skin-care advice to discover. The app also produced the new generation of Gen Z beauty stars like Charli and Dixi D'Amelio and Addison Rae.