Is it too late now to say sorry?

According to Katy Perry, it's not! The 31-year-old singer made everyone's jaw drop when she admitted on Twitter that she's looking for an apology from Taylor Swift.

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The "Rise" singer caused a ruckus when she answered a fan's Twitter question "Will you collab with Taylor swift [sic]." Her response? "If she says sorry, sure!"

katy perry tweet about taylor swift

For both KatyCats and Swifties, this news is huge. Apparently, this entire feud can be ended if all T.Swift does is pull a Justin Bieber and say, "Sorry."

Taylor, 26, and Katy engaged in a very public feud after Taylor penned a song called "Bad Blood" on her most recent album 1989. In a subsequent interview with Rolling Stone, Taylor wouldn't name names, but said the track was about a former friend who stabbed her in the back.

taylor swift, katy perry

Photo Credit: Getty Images

"For years, I was never sure if we were friends or not. 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?'"

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Things took a turn for the worst when Katy hired dancers from under Taylor. "She did something so horrible," Tay 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."

The interview — and song and music video, which focused on the take-down of a woman using Taylor's famous girl squad — caused Katy to clap back on Twitter, writing, "Watch out for the Regina George in sheep's clothing."

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The Katy drama had been mum for a while, until Taylor's ex-boyfriend Calvin Harris recently dredged it up again, tweeting, "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."

Takeway: It's not a good year to be Taylor Swift. Also, APOLOGIZE, girl! We need a Katy/Taylor reconciliation collab ASAP.