Trisha Yearwood -- Pulls Out Of SeaWorld Gig

Trisha Yearwood is the latest musical act to bail on a big music event at SeaWorld in Orlando -- and we're told it's all over the alleged shocking mistreatment of the park's killer whales.

Trisha follows the exits of Willie Nelson, Barenaked Ladies and Heart, all of whom pulled out because of revelations about whale abuse exposed in the CNN documentary, "Blackfish."

As for why Trisha bailed from February's event -- Bands, Brew and BBQ -- it's a little confusing. Our Trisha sources say the singer hasn't seen "Blackfish," but she's heard all the fuss and that's enough for her.