Lady Gaga pens emotional open letter about 'isolating' fame ahead of documentary

Lady Gaga has written an emotional open letter to fans about how she has found fame an “isolating” and “lonely” experience.

The US pop star said that she continues to find being in the public eye “psychologically challenging” as she gears up to release her eagerly-awaited documentary.

“Although surreal, happy and also hard, I'm most touched that the veil behind the aura of my fame reveals that fame is not all it's cracked up to be,” she wrote on Twitter.

“It is lonely, it is isolating, and it is very psychologically challenging because fame changes the way you're viewed by people," she continued.

"For me, it feels very unnatural, but complicated because I know it is my destiny to be a performer."

The new film, Gaga: Five Foot Two, was released worldwide at midnight on Friday, delivering a candid portrait of the star.

“With Gaga: Five Foot Two, I found myself witnessing myself in a way I am unable to see on my own," Gaga wrote.

“I felt proud, I felt sadness, I felt empowered, I felt vulnerable...but what struck me the most was the film's authenticity in the way Chris [Moukarbel], the director, chose to show my lowest lows, my highest highs, and the close relationship with my family that I clung to fiercely while writing my album Joanne."

Gaga recently postponed the entire European leg of her tour after suffering “severe pain” caused by Fibromyalgia.

Gaga, who was scheduled to perform in Barcelona on Thursday, said that she was “devastated” but had made the decision based on medical advice.

“I have always been honest about my physical and mental health struggles”, she wrote on Twitter.

“Searching for years to get to the bottom of them. It is complicated and difficult to explain, and we are trying to figure it out.

“As I get stronger and when I feel ready, I will tell my story in more depth, and plan to take this on strongly so I can not only raise awareness, but expand research for others who suffer as I do, so I can help make a difference.”