Millennials are getting so nostalgic on TikTok they're actually taking it over. The hashtag #millennials is currently trending on the app and videos reminiscing on the early 2000s or calling out millennial culture are going viral left and right. Remember your first iPod shuffle? Dial-up internet? The Backstreet Boys? Even fashion trends from the early 2000s like "twee" are blowing up all over TikTok. If you're a millennial and are on TikTok right now, you're going to go through a lot of emotions watching these.