The 26-year-old pop star was recently featured in the US show as they performed her single Teenage Dream.
She said at the launch of her new perfume Purr that she loves the show's newcomer.
Perry said to Access Hollywood: 'He's amazing! I love when any of my songs are remixed or interpreted differently. I just love that, I really welcome a creative mind to anything.'
Perry had recently written about the episode on her Twitter page.
She put: 'Oh...My...Gosh... this just brought a sweet tear to my eye! Teenage Dream on GLEE makes my heart go WEEEEE!'