The songstress hit the stage for a memorable performance featuring a whole lot of mushrooms and weirdness.
For her first number, Perry belted out her single "When I'm Gone," and gave her appearance a unique spin by adding a whole bunch of mushrooms.
As in, the set was covered in giant mushrooms, she was rocking a mushroom hat and she was joined by several mushroom-clad back-up dancers. The whole thing gave off real psychedelic Alice In Wonderland vibes, and took Twitter by storm.
Specifically, fans noticed just how... suggestive some of the dancing mushroom costumes truly looked.
Perry then returned to the stage -- still overgrown with enormous, cartoonish mushrooms -- but for a much more low-key, plaintive performance of "Never Really Over."
The songstress traded the semi-revealing red latex ensemble for a puffy, powder blue gown and crooned while seated in repose amid the decorative fungi.
Perry is no stranger to the Studio 8H stage, as Saturday's performances marked her fifth appearance on the long-running program. The GRAMMY-winning artist has been a musical guest on the show three times before, and hosted back in 2011.
Saturday Night Live airs live, coast-to-coast at 11:30 p.m. ET, 8:30 p.m. PT on NBC.