"The Trending 20" is a regular series where we round up interesting, informative and hilarious tweets from worldwide Twitter trending topics, fueled by young tweeters on the interwebs. Have a tweet to submit? Give us a shout @HuffPostTeen.
For One Direction history buffs, today was a very special day: it has officially been 1,000 days since all five boys came together as a band on the seventh season of "The X Factor UK."
Directioners obviously took to Twitter to celebrate, turning the hashtag #100DaysOf1D into a worldwide trending topic. Fans from all around the world expressed their infatuation with the music group -- in a number of different languages -- and the boys even joined in with tweets of their own.
Check out a sampling of tweets in the slideshow below and tell us: how did YOU celebrate 1D's 1000 day birthday today? ;) Sound off in the comments or tweet @HuffPostTeen.