The embattled pop star says "she'll never stop fighting for people ... to express themselves freely."
The Associated Press confirmed a report by TMZ that the singer best known for Purple Rain has died.
The singer and songwriter told Rolling Stone the North Carolina law is "obviously bullshit."
The singer, who will be a guest of honor at Miami Pride this summer, regrets answering questions about who she loves and who loves her; she wants interviewers to stick to asking about her music.
"We must take a stand against prejudice," says a statement on the band's website.
Pearl Jam and Boston join the roster of performers who are canceling shows rather than play in the officially anti-LGBT state.