Think Twitter is a harmless social media site? Think again. Here are the top 15 Twitter feuds that landed these celebs in some seriously hot water. Take note, twitterers, and think before twitching (get it?!). Yep, we went there.
After a Bieber fan tried to hack Twitter to get the star's number, Bieber retaliated by tweeting the fan's number, pretending it was his own. Confusing? Just know that the fan received over 10,000 texts in two hours! Go Biebs!