Katy Perry has defended her “friend” Ellen Degeneres following accusations she presided over a toxic workplace culture on her chat show.The presenter has been heavily criticized in recent weeks for allegedly turning a blind eye to staff members reporting misconduct, racism, and sexual harassment – with some former fans even calling for her to be replaced.However, Katy leapt to her pal’s defense on Twitter, explaining to fans that the 62-year-old had always treated her with kindness.“I know I