Katy Perry Teases Rihanna About Cannabis Use

Katy Perry has been teasing her pop star BFF Rihanna about her supposed pot smoking.

Speaking to Elle Canada, K-Pez made the jokey comment about RiRi's apparent fondness for the herb.

She said: "I think that Rihanna always looks so fresh and I'm like, 'How do you do that? We all know how much pot you smoke!'

"And you don't sleep because you're on Instagram at four o'clock in the morning!"

And Katy also revealed that she's been happier since she took up Transcendental Meditation.

"I had to find that balance," she explained. "But I learned this thing called Transcendental Meditation, which I do as much as I possibly can.

"It's 20 minutes and you're supposed to do it twice a day, but I only do it once every other day. But anyway, it works.

"People say you should work out 30 minutes a day - none of us works out 30 minutes a day!"

KP is currently atop the Official UK Singles Chart with Roar.