The female popstars have barely spoken to each other since the 'Rude Boy' singer and her ex-boyfriend patched things up, and Perry is said to believe she's 'making a huge mistake' by romancing Brown, according to the New York Daily News.
Perry told MTV that since the pair have been dating, she's had little contact with the star.
She said: "We've had dinner, and that's about it. I didn't reach out to her after the incident."
Speaking about allegations that Brown has already dumped Rihanna again for someone else, she said: "I think she is doing fine. I don't know.
"Her personal life has probably already been blown out of proportion. I don't really have to go into that. I'm sure she probably wants a break."
Perry was missing from Rihanna's Halloween party and the 'Diamonds' singer didn't go to Perry's recent birthday party either.
The last time Perry and Rihanna were spotted together was during the MTV Video Music Awards, where Rihanna publicly kissed Brown.