By Breaking Celebrity News Staff

Katy Perry hosted last night's Saturday Night Live and starred in a riotous skit about the royal family. With the he-can-do-anything Bill Hader as Prince Philip and Fred Armisen reviving his cockney-version of Queen Elizabeth, Katy was there as Pippa Middleton.

The funniest moment was when the Pippa and the Queen compared their respective bums.

"I call my [expletive] the IRA," said the Queen/Armisen. "When I walk into a pub, everybody's face explodes!"