Katy Hudson and Kate Hudson are BFFs! Wait, who's Katy Hudson? Oh, that's just Katy Perry; it's her real name. She was born Katheryn Elizabeth Hudson but uses her mom's maiden name professionally.

Katy and Kate, who guested on 'Glee' last season, are besties. Ut oh, RiRi's getting jealous.

"When we text, it's like 'Hudson here,'" Perry said, since both are Hudsons. "We are buds and we get along…We have become friends and go to game nights together, we play this game called Mafia…we play it all the time."

Oh, we get it. It's La Cosa Nostra for them.

The ladies ditch public events and clubs, which are crawling with hangers-on and the paparazzi, in favor of nerdy-cozy nesting events at home.

"We stopped going to clubs and we started staying home and having game nights, which is really fun. And she is super-cool. She is gorgeous, to die for," Perry admitted.

We can say the same thing about the other K. Hudson. Judging by the pic above, which is from the 2012 amfAR event, Perry and Hudson are bosom buddies. Thanks, we'll be here all week.