Nothing lasts forever — especially celebrity friendships. Whether they've grown apart or have had messy, public feuds, one thing is for certain — these former friends are pals no longer.

Taylor Swift and Katy Perry might hate each other now — especially after all of that "Bad Blood" and "Swish Swish" musical drama — things weren't always this way. In fact, back in the day, these two were actually friends. Or maybe friends is a little strong. Friendly acquaintances?

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taylor swift celebrity friendship breakup

In 2014, Taylor talked to Rolling Stone and admitted she was never sure where she stood with the singer — who she didn't name, but we all identified just fine. That is, until that whole tour debacle cleared things up and they went from maybe-frenemies straight to enemies.

"She basically tried to sabotage an entire arena tour. She tried to hire a bunch of people out from under me."

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Yikes. But back to easier times. Let's take a trip down memory lane and relive these celebs — and others' — better days.

Click through the gallery to see throwback pics of celebrity best friends before they called it quits.