Watch Katy Perry getting slimed on US TV
The Nickelodeon Kids Choice TV Awards is something we don't really get in the UK. But getting slimed at the awards is seen as a mark of having made it.
Past slime-ees have included Orlando Bloom, Harrison Ford, Tom Cruise, Justin Timberlake and The Jonas Brothers.
This year Katy Perry, our favourite lady-kisser, was on stage to present an award, looking rather hot in a yellow dress/blue hair combo. But check out what happens to her as she gors to announce who the winner is?