The debate over the anti-SeaWorld documentary "Blackfish" is getting a more raucous soundtrack every day.
Barenaked Ladies. Willie Nelson. Heart. Now Joan Jett. All are upset at SeaWorld. The first three have backed out of a festival at SeaWorld's Orlando theme park, and Jett is asking SeaWorld execs to stop using her song, "I Love Rock 'n' Roll," as the opening number in its "Shamu Rocks" shows.