Taylor's close friend of 13 years, Selena Gomez, posted a lengthy message on her Instagram story. She addressed the new owners of Taylor's back catalog, whom Taylor alleges are preventing her from singing a medley of her previous hits on the AMAs.
"You've robbed and crushed one of our best songwriters of our time an opportunity to celebrate all of her music with fans and the world," she wrote in part.
Gomez went on to call Swift "the most dedicated, fearless, feisty, strongest woman I've ever known," adding that she hopes there is a "change of heart over this unfortunate situation."
Halsey similarly spoke up on her Instagram story, calling Braun and Borchetta's decision "an awful business move" and "just mean."
She went on to post a video of herself singing along to Taylor's song "Mean."
In a statement Friday, Big Machine denied Swift's allegations.
"As Taylor Swift's partner for over a decade, we were shocked to see her tumblr statements yesterday based on false information," the statement said. "At no point did we say Taylor could not perform on the AMAs or block her Netflix special."
Swift's camp then issued a response claiming Big Machine Label Group sent her team a message that it would "not agree to issue licenses for existing recordings or waivers of its re-recording restrictions" in connection with her Netflix documentary or the Alibaba “Double Eleven” event she performed at on Nov. 11.
"To avoid an argument over rights, Taylor performed three songs off her new album Lover at the Double Eleven event as it was clear that Big Machine Label Group felt any televised performance of catalog songs violated her agreement," the statement continues. "In addition, yesterday Scott Borchetta, CEO and founder of Big Machine Label Group, flatly denied the request for both American Music Awards and Netflix."
Here are some stars who have spoken out in support of Swift so far:
Camila Cabello: 'A record label can't be allowed to do this to an artist...'
Sara Bareilles: 'Outrageous abuse of power and completely unforgivable. #IStandWithTaylor'
Gigi Hadid: 'Scott and Scooter, you know what the right thing to do is. Taylor and her fans deserve to celebrate the music!!'
Lily Allen: 'Solidarity with Taylor here, this sounds awful, and people wonder why music hasn't had its #MeToo moment ?'
Jameela Jamil: 'If this can happen to one of the biggest artists of all time, I cannot imagine the situation for newbies'