Things Katy Perry doesn't do? Weed, and plastic surgery

Katy Perry's always been seen as a pretty free spirit, but there are certain things she's just not into.

One of those things, it turns out, is marijuana, as she tells GQ magazine in its February issue.

"The weed - I'm not friends with it. I can't do that stuff," the 29-year-old pop star said. "I'd be like in the corner: 'Are you trying to kill me?!'"

And the other thing Perry'll shun? Going under the knife.

“I’ve never had any plastic surgery,” Perry says. “Not a nose, not a chin, not a cheek, not a t*t. So my messages of self-empowerment are truly coming from an au naturel product.”

What she does do, though, is take plenty of time to enjoy her relationship with John Mayer. While the two had a rocky relationship - she wrote the song "Unconditionally" after a breakup with the 36-year-old singer/songwriter - Perry thinks that, after some maturing, she's in a good place romantically.

“I think that I needed to grow up," she tells GQ, emphasizing that she and Mayer, despite the rumors, are just dating. “I’m just having a wonderful experience with a wonderful guy. There’s no rush.”