See Photos of Former Celebrity Besties Before Their Very Public Feuds

Katy Perry and Taylor Swift

"For years, I was never sure if we were friends or not," Taylor said allegedly about Katy. "She would come up to me at awards shows and say something and walk away, and I would think, 'Are we friends, or did she just give me the harshest insult of my life?'"

Paris Hilton and Nicole Richie

"It’s no big secret that Nicole and I are no longer friends,” Paris said in a statement in 2005. “Nicole knows what she did, and that’s all I’m ever going to say about it.”

Heidi Montag and Lauren Conrad

"My falling out with Lauren makes me sad, even years later. We were so young, but the show could have ended differently," she said. "We could have gone to dinner, agreed to disagree on our issues, and make up. We could have become friends again. It's frustrating how our friendship ended. What would have happened if we remained friends?"

Paris Hilton and Kim Kardashian

Although the two made up in 2015, Paris liked a meme on Instagram that said, "I made that b–ch famous," referring to Kim.

Ben Affleck and Kevin Smith

"We're not f–king tight," Kevin told Yahoo! Movies back in 2014. "He's got a wife that don't care for me at all. Jennifer [Garner] does not share the same sense of humor as me. She did not like my jokes. I was picking on Ben and making fun of him because I've known him for a really long time…Jennifer goes, 'You know, if you keep saying stuff about him, I'm going to kick your a-s!"

Drake and Lil Wayne

Although Lil' Wayne helped kickstart Drake's career, the rapper confessed in 2015 that the two had a falling out. The reason? Drake slept with his girlfriend while he was in prison. "This is the type of s–t that a man never wants to find out when he's locked up," he said. "Or, maybe so, cause only God knows what I would have done if I wasn't locked up [back then]."

Demi Lovato and Selena Gomez

"When you’re young and you get older, you change and people change," Demi said back in 2015 about no longer being friends with Selena. "You have things in common, and then all of a sudden, you don’t. It’s just a part of life."

Kanye West and Jay-Z

After Kanye's wife, Kim Kardashian, was robbed at gunpoint, Kanye had some harsh words for Jay Z. "Don't call me, after the robbery, and say, 'How you feelin'?'” Kanye said at a concert. “You wanna know how I'm feelin'? Come by the house. […] Our kids ain’t never even played together. Run that s–t.”

Drake and Sean "P. Diddy" Combs

The two rappers were buddy-buddy back in 2013, but the two got into a brawl in 2014 that sent Drake to the hospital. However, Diddy later said it was just a "misunderstanding."

Lindsay Lohan and Nicole Richie

The two were party girls back in the early '00s, but Nicole admitted recently that she hasn't "spoken to [Lindsay] in a while."

Selena Gomez and Kylie/Kendall Jenner

The three were pals briefly in 2014, but a few months later, Selena unfollowed the Jenners and deleted all their pictures. As for the reasons why, rumors alleged that it was about Justin Bieber.

Blake Lively and Leighton Meester

Throughout the filming of Gossip Girl, rumors of a on-set rivalry clouded the costars, with Blake admitting in 2009 that the two don't hang out.

NEXT: Ryan Gosling, Rachel McAdams and More Famous Co-Stars Who Hated Each Other IRL!