Just as when everyone thought Katy Perry and Taylor Swift would no longer be friends again, the California Girls singer let out a fresh new revelation.

Perry responded to a fan's Twitter post on Saturday asking whether it would still be possible for her to make a collaboration with Swift, who reportedly used her as the subject of the 2014 hit song Bad Blood. The response, while short, signaled a positive turn for the long-standing feud.

"If she says sorry, sure!" was the response Perry let out to the fan. Her response has since been retweeted almost 22,000 times.

Swift's "bad blood" with Perry goes all the way back to 2014, in an interview with Rolling Stone saying that a fellow pop star - written as a blind item, "tried to sabotage an entire arena tour."

Perry, unamused, took to Twitter to fight back Swift's claims, saying:  "Watch out for the Regina George in sheep's clothing," providing reference to the reviled Mean Girls antagonist.

The pop star further fueled speculations that her tweet was about Swift, with Perry revealing in a tell-all with Billboard: "If somebody is trying to defame my character, you're going to hear about it."

Swift's ex-beau Calvin Harris also spilled the beans on the feud in a series of explosive tweets following their turbulent breakup. "I know you're off tour and you need someone new to try and bury like Katy ETC but I'm not that guy, sorry. I won't allow it," said the Scottish DJ.

Wasting no time looking nonchalant, Perry retweeted one of her old Twitter posts in an apparently affirmative response to Harris: "Time, the ultimate truth teller."

Swift, however, has yet to comment on anything regarding the feud at the moment. But whether her beef with Perry will finally come to a close is a moment that has yet to see a favorable closure.