Lady Gaga still "wakes up and feels like a loser".
The 'Born This Way' hitmaker - who was named the most influential celebrity in the world earlier this month - explained being bullied throughout her teenage years will stay with her for her "whole life" and she will never feel like she has made it.
She said: "Being bullied stays with you your whole life, and no matter how many people are screaming your name or how many number one hits you have, you can still wake up and feel like a loser."
Gaga - real name Stefani Germanotta - admitted her songwriting also forces her to pour "salt, arsenic and poison" into the wounds of her childhood, but ultimately it can be a healing experience.
She added to Britain's Time Out magazine: "There were a lot of bullies. You have to open the wound and pour salt and arsenic and poison into that wound and you must get out a needle and poke and prod then sew it back up again.
"And when I'm handed a beat that sounds amazing, that beat is the scissors, and then I cut the wound I've just sewn up, and I go back in. I go back in and ask myself the same questions again and again and again, 'Why am I here?'"