Joan Jett performs at The ALTimate Rooftop Christmas Party at W Hollywood on December 9, 2013 in Hollywood, California.
Photo by Christopher Polk/2013 Getty Images for Clear Channel

Joan Jett may love rock and roll, but she's not as fond of Sea World -- and she's demanding the theme park stop playing her music in its shows.

Jett, a longtime animal activist, is joining a boycott of Sea World that gained steam after the release of the documentary Blackfish, which shows many cases of whale and dolphin abuse. She wasn't scheduled to perform at the park, but is asking that her hit "I Love Rock 'n' Roll" be removed from the "Shamu Rocks" killer-whale show.

Joan wrote an open letter saying, "I'm among the millions who saw Blackfish and am sickened that my music was blasted without my permission at sound-sensitive marine mammals."

Heart, Willie Nelson and Barenaked Ladies are among the artists who've canceled performances at the park.