09/16/2013 10:33 am ET Updated Sep 16, 2013

Katy Perry Calls Out Rihanna: 'We All Know How Much Pot You Smoke!'

Katy Perry and Rihanna may have burned through men, but when it comes to each other, they found love. The best friends and singers haven't been shy about expressing their friendship, hugging, giggling and fondling each other during award shows and on the red carpet.

So it's no surprise that Perry, 28, spoke candidly to Elle Canada about her relationship with Rihanna, calling out the 25-year-old on anything from drugs to her Instagram behavior.

"I think Rihanna always looks so fresh and I'm like, 'How do you do that? We all know how much pot you smoke!'" she told the publication. "And you don't sleep because you're on Instagram at four o'clock in the morning."

This isn't the first time Perry has spoken about her friendship with the "Diamonds" singer, of course. In July, Perry alluded to reports of a temporary falling-out with Rihanna for reconciling with ex-boyfriend Chris Brown.

"I love her and everytime I see her, I'm reminded of the light she has," Perry told Elle U.K. She later added: "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."



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