Joining the growing list of band you didn't know you were still walking the earth REO Speedwagon joined Heart this week in canceling shows at Sea World. (CNN) -- Add REO Speedwagon to the list of musical acts canceling SeaWorld shows because of the documentary "Blackfish." "Due to concerns regarding our February 16 appearance at SeaWorld, we have chosen to cancel the performance," the rock band said on its Facebook page on Friday. A promoter could put together a great concert series with the acts who have canceled SeaWorld shows in the past several weeks, includingTrisha Yearwood, Willie Nelson, Cheap Trick, Heart and Barenaked Ladies. The acts bailed on the Orlando theme park's "Bands, BBQ and Brew" concert series amid pressure from fans who started online petitions, tweeted and posted on Facebook pages demanding they not play SeaWorld.