The "Roar" singer posted this pic with the crustacean hanging from her bottom lip, with the caption "sometimes I can get a little crabby."
This is definitely a new twist on the standard selfie, but we don't know if many celebs are going to want to follow suit.
We'd be a little creeped out with a crab on our face (and is that a safety pin in her ear?), but hey, to each their own.
Katy recently stirred up some controversy for her use of animals in her jungle-themed "Roar" video, with PETA saying "animals used for entertainment endure horrific cruelty and suffer from extreme confinement and violent training methods."
We're not sure where Katy got the crab for this shot, but hopefully it didn't mind posing for one quick pic with the pop star.