"I'm also ready for self-proclaimed feminists to start speaking out or taking action for women's rights," Lovato explained
Credit: Jon Kopaloff/FilmMagic; Steve Granitz/WireImage

“Bad Blood” might be brewing between Demi Lovato and Taylor Swift.

Late Sunday, Lovato shared a pointed tweet after Swift announced her $250,000 donation to Kesha as the “TiK ToK” singer’s legal battle with Dr. Luke and Sony Music continues.

“Take something to Capitol Hill or actually speak out about something and then I’ll be impressed,” Lovato, 23, declared via Twitter.

Lovato is one of the stars who showed support for Kesha since she hit a road block in her legal effort to be released from her contract with longtime producer Dr. Luke, 42, and Sony. (On Friday, a New York Supreme Court judge denied Kesha’s request for a preliminary injunction that would allow her to record and release music without Dr. Luke, who she is also suing for allegedly drugging and raping her. Luke has denied Kesha’s claims through his lawyer, Christine Lepera, and countersued for defamation.)

Lovato spoke out on the decision on Saturday, tweeting, “#FreeKesha. this is only gonna make you stronger, you brave and beautiful girl. Prayers are with you @KeshaRose.”

Over the weekend, Lovato shared additional tweets about empowering women and alluded to her work for mental health reform in Washington, D.C.

“I’m also ready for self-proclaimed feminists to start speaking out or taking action for women’s rights,” she wrote.

Although Swift, 26, has not tweeted about the case, she made it clear she supports Kesha in a statement released Sunday.

Swift’s rep told PEOPLE, “In a show of support, Taylor Swift has donated $250,000 to Kesha to help with any of her financial needs during this trying time.”

Reps for both Lovato and Swift did not immediately respond to requests for comment on Lovato’s tweets.