The 28-year-old singer admits she 'went through some horrific things' when she was 19 and relied on 'a lot of mental and physical therapy' to help her to heal.
Talking on The Howard Stern Show, Gaga confirmed she was raped by a music producer 20 years her senior.
When asked about the rape she initially said: 'I don't...I don't want to... Happy times! Let's talk about happy things!'
But when the radio host pressed her on the issue, she said: 'I went through some horrific things that I'm able to laugh [at] now, because I've gone through a lot of mental and physical therapy and emotional therapy to heal over the years.
'My music's been wonderful for me. But, you know, I was a shell of my former self at one point. I was not myself.
'To be fair, I was about 19. I went to Catholic school and then all this crazy stuff happened, and I was going, "Oh, is this just the way adults are?'...I was very naive."'
Listen to full interview HERE