So Taylor Swift and Ed Sheeran have been close friends for a while now. They collaborated on "Everything Has Changed" all the way back in 2012, and over the years, have become frequent guests on each other's tours. In fact, it's thanks to one of Swift's famous Fourth of July parties that Sheeran reconnected with his now-fiancé (or wife?) Cherry Seaborn, a childhood pal who he began dating after Swift hosted them at her Rhode Island home.

As with any good BFFship, that means Swift and Sheeran are always down for a little playful roasting. Earlier this year, Swift poked fun at Sheeran for "elevating himself geographically" so he could "seem better" than her, and he shot back with a "it's only because you wear f--king heels all the time."

And now, they're at it again. In a video posted to Swift's Instagram on Wednesday (Sept. 12), the "Delicate" singer dragged Sheeran for struggling to complete their hike. "You okay bro?" she asked as Sheeran breathed heavily in the background. He responded, fittingly, by flipping her off.

"This is called exercise. Have you ever done cardio?" she continued.

"Eh, now and then," Sheeran said, before Swift hit him with one last zinger: "Strumming a guitar doesn't count."

Watch the video below.

Taylor Swift's 'Reputation' Tour: See All the Celebrity Guest Stars