Credit: Jason LaVeris/FilmMagic; James Devaney/

Relax, Kristen Stewart: Katy Perry is no Twi-hard, and she's not hooking up with Robert Pattinson.

That's the message Perry, 25, made loud and clear on Twitter Sunday in response to last week's reports that she's getting romantic with the New Moon superstar, 23.

"Read a bunch of yesterdays-news-BULLOCKS." Perry Tweeted. "Ppl should know by now that I don't do vampires, but I do, DO @rustyrockets," she says, in a call out to current boyfriend Russell Brand. "Don't get it TWISTED!"

Radaronline claimed that the singer and actor "got up close and personal" and "only had eyes for each other" during a Dec. 16 outing at Dimples Supper Club in Burbank, Calif.

Yet one of the club's bouncers told of the group's night out: "There was a big group and no one seemed to be romantic. They were just laughing and having a great time. [Pattinson] looked buzzed and happy."