Following the release of the documentary "Blackfish," which alleges grave mistreatment of marine mammals at SeaWorld, a number of performers affiliated with the park have broken ties. Despite SeaWorld's efforts to dispute claims made in the film, musical acts Willie Nelson, Cheap Trick, Heart and others decided to cancel planned performances at the park. In a candid interview with Rolling Stone, Heart member Ann Wilson made her views on SeaWorld clear, calling captivity at SeaWorld "slavery, plain and simple."
Before seeing the movie, I always imagined the orcas got to live in a big extended oceanic area when they weren't performing, but they live in a steel swimming pool and it basically drives them insane... [Heart] just couldn't go make a bunch of money from them and sign our names and underline it.
Her sister and bandmate, Nancy, also described captivity at SeaWorld, as revealed in Blackfish, as "upsetting and heartbreaking." Both sisters claimed they were unaware that their performance was scheduled for SeaWorld; they knew only that they were set to perform in Orlando. "When I found out it was indeed SeaWorld," Nancy told Rolling Stone, "Well, we aren't playing there anymore."