12 Celebs who aired their dirty laundry all over twitter (With Pictures)

6. Seth Rogen and Justin Bieber

Justin Bieber is a very polarizing celebrity—people either love him, or they can’t stand him. In 2014, Seth Rogen Tweeted that Bieber was a “piece of sh*t,” and was obviously still upset about the first time he met Justin years ago. Justin then responded, apologizing for not “bowing down” to Seth when the two met. Bieber said that he was shy and didn’t want to seem too “over the top.” He then stated that he was still a fan of Seth’s work. This may be one of Bieber’s classiest responses to a celebrity feud. From what we can tell, Rogen left the situation alone after that.