Madonna introduced the Firework hitmaker to crystal healing, an alternative medicine technique that can supposedly mend a variety of health woes by changing a person's energy.
Perry, who split from John Mayer earlier this year (14), now employs the practice to keep her in top shape while on tour and to help her find love.
She says, "I'm a huge fan (of Madonna). I've got to know her recently and she's incredible... She had given me some advice on how to maintain my health throughout the tour. She had given me a number for a crystal healer. Everything stems from people's energy so it makes sense. I sleep with a rose quartz in my hand at night. It's supposed to help you find love and also heal your heart."