Country singer Trisha Yearwood has become the latest star to scrap a show at SeaWorld in Florida over the theme park's killer whale treatment scandal.

New movie Blackfish exposed what goes on behind the scenes at the tourist attraction, and although Yearwood reportedly hasn't seen the documentary, she doesn't want to be among the celebrities turning a blind eye to the allegations of cruelty.

Her country music peer Willie Nelson, Barenaked Ladies and Heart have also pulled out of scheduled performances at the Orlando park because of the CNN documentary expose.