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'."
Asked if she had ever confronted the rapist, who was 20 years older than her, she said: "I think it would terrify me. It would paralyse me.
"I saw him one time in a store and I was so paralysed by fear. Because it wasn't until I was a little bit older that I went, 'Wow, that was really messed up'."
The blonde beauty, who is dating actor Taylor Kinney, didn't tell anybody about the incident at the time, but eventually decided to seek help.
She said: "I don't know what I was thinking. I didn't tell anybody.
"And I didn't even tell myself for the longest time. And then I was like, "You know what? All this drinking and all this nonsense, you have to go to the source, otherwise it just won't go away. It will not go away'."
Although Gaga did not name her attacker, representatives for the singer were later forced to deny claims by Kesha's lawyer that music producer Dr Luke, 41, was the man responsible.
Attorney Mark Geragos tweeted, "Guess who the rapist was?' And when a fan asked if it was Dr Luke, he responded '#bingo.'
Lady Gaga's representative told TMZ, the allegations are "absolutely not true" although refused to comment on the identity of the attacker.
The spokesman later added: "The Dr Luke lawsuit is utterly incomprehensible. This simply isn't true and how dare someone take advantage of such a sensitive matter."
A representative for Dr Luke, real name Lukasz Sebastian Gottwald, told the website: "Mark Geragos' statement is completely false and defamatory. Luke met Lady Gaga twice for less than half an hour total in those two meetings combined. He has never been alone with her and never touched her. Neither meeting was in that time frame reported."
But Mr Geragos stood by his allegations, telling TMZ: "I said it because it's true." He mentioned the Bill Cosby allegations have "now made others more courageous about coming out".
What's more, The attorney said he wants to depose Gaga in Kesha's sexual assault lawsuit against Dr Luke, also telling TMZ that three other women "not as famous" claim to have similar experiences to Kesha and will be deposed as well.
Back in October, the singer filed a lawsuit for sexual assault and battery against Dr Luke - allegations that he denies.
- Daily Mail
