Katy Perry will not be hanging out with Rihanna anytime soon, based on what she revealed in her latest interview. Though the pop singers used to be close, Perry has decided to close that chapter of her life, and it may be due to the 25-year-old Rihanna’s hard-partying ways and on-and-off-again relationship with Chris Brown.

In the most recent issue of Elle UK, Perry, 28, says, "I love her and every time I see her, I'm reminded of the light that she has. There's a lot of dark in this business. I know a lot of people out there with the most detrimental entourages -- they are the root of their demise. It's really unfortunate, but you can't save these people. My days of celebrity saving are over."

Just last April, Perry spoke about her friendship with Rihanna and explained how they became such close friends.

“[Rihanna] had this cool studded Valentino bag that had sparkly stuff on it," Perry, thinking of a moment in 2009, told the May issue of Elle magazine.

Perry complimented Rihanna on the bag, and then Rihanna told the pop star that she would send her one. But Perry was skeptical.

"I was like, 'Oh great, here's one of those tricks who talks fast friends but never lives up to it,'" said Perry. But Rihanna stuck to her word.

"Valentine's Day came around, and I got a little Valentino bag in the mail from her," Perry admitted. "I thought, 'Wow this is a woman of her word.'"

Rihanna then explained why she bonded with Perry.

"I'll tell you, you do not find people like her in this industry. She's gorgeous, charming and so unedited it's scary. That's what intrigued me most when I first met her: she said it like she saw it.

"I trust people like that. I feel safe around people who tell me the [expletive]-up [expletive], because I know they'll always tell me the truth,” Rihanna added.

But the last time Perry and Rihanna were seen together was during the MTV Video Awards last September.