There's no doubt about it: breakups are messy and heartbreaking. If you're a celebrity, however, they can be infinitely worse. With the whole world making assumptions and watching their every move, the pressure is probably pretty overwhelming.\nThis pressure could explain why some celebrities choose to lash out publicly, whether to clear their own name or drag their ex's through the mud.\nThough there's often some serious shade being thrown, we can't help but admit that it's pretty intriguing to see these typically private celebs open up in such a public way. Here are 9 celebrities who have publicly blasted their exes on twitter.\n1. Selena Gomez\nWay back in November 2013, the on-again-off-again couple were definitely off. Justin had recently leaked a teaser for his music video "All That Matters," which featured him making out with model Cailin Russo. Selena responded with a selfie and a tweet stating "I thought he only liked the Latina category. Smh..."\nhttps://twitter.com/selenagomez/status/406629859163901952\nThis past summer, Justin got heat from fans for posting photos of his new girlfriend, Sophia Richie. Justin threatened to make his Instagram account if fans didn't "stop the hate."\nSelena posted a comment on his photo, shaming him for getting mad at his fans.\nCredit: Cosmopolitan.com\n2. Justin Bieber\nJustin replied to Selena's with two vague comments. He later deleted his Instagram all together, only to reactive in February.\nCredit: Cosmopolitan.com\n3. Zayn Malik\nFollowing a messy split with Little Mix's Perrie Edwards, Zayn took to Twitter to subtly shade his ex. The "Mind of Mine" singer retweeted a photo by Shady Music Facts asking whether Little Mix or Fifth Harmony had the better single. Zayn retweeted it, thus voting for Fifth Harmony over Perrie's group.\nPerrie did get her revenge, though, thanks to the Little Mix hit "Shout Out to my Ex," in which Perrie sings "This is a shout out to my ex/Heard he in love with some other chick / Yeah yeah, that hurt me, I'll admit / Forget that boy, I'm over it / I hope she gettin’ better sex / Hope she ain't fakin’ it like I did, babe / Took four long years to call it quits / Forget that boy, I'm over it"\nCredit: Metro UK\n4. Rob Kardashian\nFollowing Rob's 2012 breakup with singer Rita Ora, he took to Twitter to accuse his ex of cheating with 20 different men. Yikes!\nCredit: Vibe.com\n6. Jai Brooks\nJai Brooks is a Youtuber best known for dating Ariana Grande on-and-off from 2012-2014. Jai took to Twitlonger to accuse Ariana of cheating on him with Nathan Sykes of the band The Wanted.\nCredit: Daily Mail\n7. Ariana Grande\nThe pop star responded to her ex in a series of tweets in which she appeared to take the high road. She finished her rant by stating "I'm finally happy. Words can't hurt me anymore."\nCredit: Daily Mail\n8. Iggy Azalea\nAfter a video emerged of her fiance Nick Young admitting to cheating in 2016, Iggy Azalea stayed with him for a few months before ending it abruptly. The controversial rapper later took to Twitter explaining her decision.\n9. Calvin Harris\nBefore there was the mess that was Hiddleswift, there was the even bigger trainwreck that was Caylor. Calvin Harris and Taylor Swift dated for over a year, and their 2016 breakup seemed relatively amicable. Then, photos of Taylor and Tom began to leak and Taylor's team began pushing for recognition of Taylor's help in writing Calvin Harris's hit "This is What You Came For." Calvin took to Twitter to set the record straight and tell his side.