Celebrity Celebrity Relationships Celebrity Breakups Hailey Baldwin 'Super Upset' at Justin Bieber Unfollow Amid Sofia Richie Drama: Source "Out of nowhere, Sofia apparently made Justin unfollow Hailey and now she and her friends are all super upset," a source tells PEOPLE exclusively By Melody Chiu Melody Chiu Melody Chiu is an Executive Editor at PEOPLE overseeing music, events and emerging content. She has been with the brand since 2009, editing, writing and reporting across all entertainment verticals. She has written cover stories on Taylor Swift, Selena Gomez, Melissa McCarthy, Blake Shelton, Jordan Turpin and Sandra Oh. The Los Angeles native graduated from the University of Southern California and has appeared on Extra!, The Talk, Access Hollywood and Good Morning America. People Editorial Guidelines Published on August 15, 2016 02:55PM EDT Photo: Source Instagram Justin Bieber‘s latest fling with Sofia Richie is causing a lot of drama. Over the weekend, the “Sorry” singer, 22, lashed out at his fans on Instagram after they bombarded his comments section with hate on photos he posted of himself with Richie, 17. Then, the star’s ex, Selena Gomez, 24, defended his Beliebers before the pair got into a spat that included cheating allegations. Now, a source tells PEOPLE exclusively Bieber’s other ex, model Hailey Baldwin, 19, is also peeved at him. “Justin unfollowed Hailey on social media, and now all their friends are talking s— on Sofia and him and how messed up it is,” says the source. Although Bieber and Baldwin were “never officially a couple,” those in their circle of friends “knew they were together” and believe Richie made the singer unfollow Baldwin, adds the source. Meanwhile, the source notes the pair stopped talking for a few months after Baldwin was linked to Drake after his Memorial Day party in May. “Bieber wasn’t happy about it, and so they haven’t really been in touch in a bit,” says the source. “But out of nowhere, Sofia apparently made him unfollow Hailey and now she and her friends are all super upset.” RELATED VIDEO: Things Are Heating Up Between Justin Bieber and Sofia Richie Late Sunday night, Baldwin seemingly addressed the ongoing drama with a long post on her Instagram account, which has since been deleted. “We’ve all had our fair share of things we’ve done, both good and bad. What makes the present so powerful is when we take complete responsibility for our actions, we allow ourselves self-growth,” she wrote. “Misplacing the blame onto someone else isn’t going to get you to the next stage in life, so try not to manipulate a situation to make yourself look better. The truth always come to light, so it’s better just to own it.” Baldwin later tweeted, “The only thing I “weigh in on” is everyday life in general. Don’t rope me into things I’m not a part of and please respect my privacy.”