With the popularity of social media, it’s no surprise that celebrity beefs are no longer exclusive to tabloids. Putting their famous feuds above PR moves, these celebs threw impulse control out of the window. And instead, they publicly put their industry mates on blast for the benefit of the entire Twitterverse. From Kim Kardashian to Katy Perry, these A-listers chose to air their dirty laundry for the entire world to see. And some had to learn the hard way that screenshots are forever. So here are all the best celebrity feuds on Twitter that had us @ing all of our mutuals.