Taylor Swift and Katy Perry's pop star feud just keeps on giving!
Over the past few years, these famous frenemies have seemingly used their beef as songwriting material, addressed their differences in interviews and have gotten their squads involved.
Here's a look back at how the feuding first began and how it's progressed:
Sept. 8, 2014: Taylor Swift's Rolling Stone Interview
Prior to Swift's revealing Rolling Stone tell-all, Perry and Swift appeared to be friends, gamely posing at awards shows together.
But Swift had everyone talking ahead of the release of her GRAMMY-winning 1989 album, thanks to her quotes to Rolling Stone magazine, in which she revealed that she had a feud with a fellow pop star, which inspired her hit song, "Bad Blood."
"For years, I was never sure if we were friends or not," Swift said. "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?'"
"She did something so horrible," she continued. "I was like, 'Oh, we're just straight-up enemies.' And it wasn't even about a guy! It had to do with business. She basically tried to sabotage an entire arena tour. She tried to hire a bunch of people out from under me.”
Several internet commenters then noted that Perry did lure a few backup dancers away from Swift's tour as she embarked on her own Prismatic tour in 2014. However, according to one of the dancer's agents, the dancers "exercised a 30-day out in their contracts and left Taylor, but Katy didn't steal them."
"They just didn't want to tour with her anymore because there is basically no choreography or dancing in her show," the agent claimed.
While Swift did say that the feud had nothing to do with a boy, both previously dated singer John Mayer.
Sept. 9, 2014: Katy Perry Calls Swift a 'Mean Girl'
Watch out for the Regina George in sheep's clothing...— KATY PERRY (@katyperry) September 9, 2014
Perry didn't shy away from Swift's Rolling Stone comments, tweeting the next day: "Watch out for the Regina George in sheep's clothing..."
In January 2015, Perry confirmed the tweet was pointed at Swift.
"If somebody is trying to defame my character, you're going to hear about it," Perry told Billboard magazine when asked if her tweet was about the "Shake It Off" singer.
May 23, 2015: Taylor Swift Will Never, Ever Talk About Katy Perry Again
In an interview with The Telegraph, Swift made it clear she was over Perry. "I'm not giving them anything to write about," she said when asked about about her nemesis. "I'm never going to talk about her in my interview. It's not going to happen."
Swift did, however, confirm she had her "enemies" in the business. "It's not real if someone appears to never have any issues with anyone," she explained. "I have my friends. I have enemies."
July 22, 2015: Katy Perry Hits Back at Taylor Swift Amid Her Nicki Minaj Beef
Finding it ironic to parade the pit women against other women argument about as one unmeasurably capitalizes on the take down of a woman...— KATY PERRY (@katyperry) July 22, 2015
The pop star feud was resurrected when Perry jumped in on the Twitter beef between Swift and Nicki Minaj over the 2015 MTV Video Music Awards nominees.
"If I was a different 'kind' of artist, 'Anaconda' would be nominated for best choreo and vid of the year as well," Minaj tweeted, getting vocal about her VMA snub. “If your video celebrates women with very slim bodies, you will be nominated for vid of the year."
Swift took the tweet personally, responding, “I've done nothing but love and support you. It's unlike you to pit women against each other.”
Perry then chimed in with a devastating tweet referencing "Bad Blood."
"Finding it ironic to parade the pit women against other women argument about as one unmeasurably capitalizes on the take down of a woman..." she wrote.
July 27, 2015: Taylor Swift Throws 'Left Shark' Shade at Katy Perry