Katy Perry's Prismatic world tour kicked off May 7 in Northern Ireland, where an audience member captured her sticking her finger in her mouth during one of the interludes.
It seems like just another cutesy gesture, until you realize she's probably making herself "puke" up this blue and green paint.
Katy's stunt is maybe a little wink at another pop star who's had someone puke paint on her before?
Green paint, in particular.
Watch the full video of Katy's paint explosion:
Emails to reps for Katy Perry and Lady Gaga were not immediately returned.