After a few months of public détente, a bitter fight between some of the music industry’s most powerful figures was ratcheted up again on Thursday night when Taylor Swift called on her fervent army of fans to express their displeasure with the men she said were controlling her most recognizable music.

In a note posted to Tumblr, and then across the rest of her millions-strong social media channels, Swift said that she was being blocked from performing her old songs at an awards show, as well as from using them in a coming Netflix documentary, by the executives who own the master recordings for her first six multiplatinum albums.

Big Machine Label Group, the Nashville-based home of Swift’s music for more than a decade, said in a statement on Friday that it was shocked by the singer’s claims and that it had “continued to honor all of her requests to license her catalog to third parties as she promotes her current record in which we do not financially participate.”

The move by Swift, one of pop’s biggest and most carefully calibrated stars, yet again brought typically opaque industry negotiations into the open. Her followers promptly made #IStandWithTaylor the top trend on Twitter as some shared what they said was the personal information of her named rivals.