Katy Perry's 'Swish Swish' angers Taylor Swift pal Ruby Rose

Katy Perry could be singing about any number of things on her new Nicki Minaj-featuring diss track Swish Swish. Released at midnight Friday, the track is Perry's third single from her new album Witness (after Chained to the Rhythm and Bon Appetit), opening with the lyrics, "A tiger don't lose no sleep / Don't need opinions from a selfish or a sheep / Don't you come for me, no, not today."

But already, listeners think she's singing about Taylor Swift — potentially including one of Swift's pals, Ruby Rose.

Rose took to Twitter to condemn the song. And while her tweets don't name-drop Swift, she had plenty of other complaints about Swish Swish — mainly, that Perry isn't delivering on her promise to release a new album of "purposeful pop."

"I just think with everything going on in the world to go from rebranding as political activist only to ditch it and go low.. is.. a bummer," she wrote, referencing Perry's political activism during the 2016 presidential campaign.

Why speak up? Rose said, "I've always stood up for the people I love and against things I think are cheap or mean spirited."

Perry and Swift's long personal history stretches back to Perry's relationship with Swift's ex John Mayer, the betrayal allegedly inspiring Swift's 1989 hit Bad Blood. However, Perry attempted to shut down online chatter linking her new songs to Taylor Swift in an interview with EW, saying that “there is no one thing that’s calling out any one person" on Witness.

Perry's jam-packed schedule of TV appearances have given her plenty of chances to premiere Swish Swish live. On Friday night, she appeared on The Tonight Show with Jimmy Fallon, ahead of performing on Saturday Night Live's season finale on Saturday. On Monday, she heads to James Corden's Late Late Show "Carpool Karaoke" special.

Perry's new album Witness, for which she shared the cover art earlier this week, drops June 9.