On Tuesday, Perry shared a post on Instagram that indicated not only was their beef squashed but also got fans hoping there could be an upcoming musical collaboration.
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The "American Idol" judge's post's consisted a photo of a plate of what looked like homemade chocolate chip cookies with the words "peace at last" written in red icing on top of the plate. Perry captioned the post, "feels good @taylorswift" along with a heart emoji and tagged the "ME!" singer in the photo as well.
Perry also named the post's location as "Let's Be Friends."
While Swift didn't post anything herself, she commented on Perry's photo with 13 heart emojis. And according to fans, the amount of heart emojis might not be a coincidence as Swifties know 13 is the pop star's favorite number. Because of this, many people theorized a possible collaboration could be in the works between the former enemies.
"DO I SMELL A COLLAB" a fan asked. "So does this mean a collab is coming?!" another commented.
"a katy x taylor collab is COMING," a person added. Even Radio Disney's Instagram account chimed in and said, "So does this mean a collab is coming?!" Bachelor Nation's Lauren Bushnell also commented with a funny pun: "A batch made in heaven."
If you recall, Perry and Swift used to be friends way back in 2009. However, their friendship was said to have hit a roadblock when Perry became close to John Mayer, who was rumored to have previously dated Swift. The "Gravity" singer also dueted with Swift on her "Fearless" tour.
The drama escalated when backup dancers switched from Perry's tour to Swift's and then back again to Perry. The "Firework" songstress gave her side of the story regarding the dancer debacle on "The Late Late Show's" "Carpool Karaoke" in 2017.
Both Perry and Swift are each believed to have written a song about their rival at the time: Perry's 2017 hit "Swish Swish" and Swift's song "Bad Blood" in 2014.
Luckily, it seems like the bad blood is now gone for good.