Lady Gaga has revealed how the bullying that she endured during high school has stayed with her all her life.

The 34-year-old singer bravely opened up during an interview with Lisa Wilkinson on “The Sunday Project.”

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“I know you were badly bullied in high school. I was too, so I can really relate to a lot of your lyrics,” said Wilkinson.

Acknowledging the lasting impact that bullying has had on her, Gaga replied, “It stays with you your whole life.”

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Despite her suffering, the iconic music star insisted that the experience taught her about the importance of kindness.

She continued:  “I remember things my bullies said to me in front of other people and no one said anything, nobody said to me, ‘Are you OK, are you fine?’ In fact, if I were to speak up about a bully being mean to me, it would just make it harder for me at school.

“Being bullied has taught me the importance of spreading kindness in the world because I think it’s something that we can fix.”

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It was those experiences that inspired Lady Gaga to start the Born This Way Foundation in 2012 which aims to “support the wellness of young people, and empower them to create a kinder and braver world.”

The Grammy and Oscar winner has just released Chromatica, which is her first album in four years.