Heart Cancels SeaWorld Appearance Due To 'Blackfish' Controversy

Heart have canceled an upcoming appearance at SeaWorld, following the airing of CNN's documentary Blackfish, which chronicles the lives of captive orcas.

"Heart has chosen to decline their forthcoming performance at SeaWorld on 2/9/14 due to the controversial documentary film Blackfish," the band wrote on its Twitter page.

Nancy Wilson also hit her personal Twitter page to add a further explanation: "The Sea World show was planned long ago as an Orlando show. Had we known, we'd have said no then. We said no today."

Other acts to cancel gigs at the park include Willie Nelson and Barenaked Ladies. Motley Crue drummer Tommy Lee has been an outspoken opponent of SeaWorld for a long time, insisting the park does not play his music during its "Shamu Rocks" segment.

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