Christina Aguilera has "f***** up the cartilage" in her knee by wearing high heels on stage.

The 43-year-old actress has revealed the long lasting impact of her style choices while performing, as she insisted singer-songwriter Raye, 26, is making the right choice by going barefoot for her concerns.

During a joint interview, Rolling Stone magazine asked Christina if she had any advice for Raye, and she said: "I think she’s already ahead of the game, to be very honest with you.

“I mean, even the fact that she sings barefoot. I’ve already f***** up my legs and my feet so bad with all this high-heel nonsense. I f***** up the cartilage in my knee.

"I love that about you, though. I never had the balls to just do it. Those are the best when you just feel the floor underneath.”

The 'Prada' hitmaker told the 'Beautiful' singer that she feels less distracted when she's not wearing shoes.

She explained: "I feel like when I’m wearing shoes, I’m thinking about wearing shoes. Is that weird?"

Elsewhere during the interview, Raye asked the 'Genie In A Bottle' star if she ever had any moments in her career where she "didn't feel in control".

Christina said: "When I came into this business, there was a really big pop boom, and it was very specific what a label wanted a pop star to look like, to sound like. I wanted it so bad.

“I felt like my voice was stifled. You’re going to have situations where you have no creative control or you’re in a position where your hands are tied.

"It’s just no place for an artist. When my hands feel too bound and I feel like there’s no breathing room, that’s when I start to suffer.”

The pop megastar has been known around the world since she was in her late teens, but almost three decades into her music career she insisted that fame has "never been the goal" and that she only wants to share "love and creativity" with her work.

Over the summer, she told Paper magazine: "I have a really good sense of humor about myself. At the end of the day, I don't take myself and fame so seriously. I’m in it for the love and the creativity, and how I can connect and hopefully spread messages.

"But as far as the fame itself, it's never been the goal. That's the most frustrating part for me: having to over give myself when I'm such a private person, especially with this age of social media. Everybody wants something of you."