Lady Gaga called Perez Hilton "fake."

The celebrity blogger fired back that the singer is a "real-life vampire."

Any minute, we can expect to hear the familiar strains of "Sticks and stones..."

Gaga spoke at length Tuesday on Howard Stern's radio show about events that led up to the end of her longtime friendship with Hilton in 2011.

According to Us Magazine, the 27-year-old singer said it started when Hilton asked some "really terrible questions" during an interview. "He was being very negative about 'Born This Way,' and we had had a lot to drink. He was supposed to be my friend and I felt betrayed, so I started crying. My friend had to come in and pull the camera out, they wouldn't turn the cameras off."

Drinking... cameras... Something should have told her that was a bad mix.

"He apologized," Gaga continued, "but I sort of felt like it was like, 'But I'm Perez Hilton so I'm allowed to treat you this way.' I looked at him and said, 'Just because you are who you are, does not mean that our friendship doesn't mean anything when the cameras turn on. So, now I see who you really are.' And I was done after that. And he's just mad that I don't want to hang out anymore. I don't want to be around fake people. I really believed, when I first met him, that he wanted to change. I really believed that he wanted to bully people less on his site and that he wanted to move into a more positive space. I was really there for him and I really supported him."

Turns out it wasn't positive space that Hilton wanted to move into. Gaga claims he wanted to reside in a New York City apartment neighboring hers.

"I freaked out so much about it because I have no rights," she said. "My sister [Natali] was sleeping there and it made me scared and upset. And then he lied and told everybody that he wasn't stalking me, but that next day -- after I asked him to leave me alone -- he put an offer in on two apartments in the building. Why do you need to live in my apartment? There's only one reason: to try to hurt me, or harass me, or blow yourself up. If you hate me, hate me from over there. Continue to fire away on your blog and your Twitter."

Wait, he wanted to blow himself up? By living next door to Gaga?

As Gaga predicted, Hilton fired away on Twitter: "@LadyGaga So you called ME fake on the @HowardStern this morning. Ha! Thanks for the laugh! Have you looked in the mirror lately??? xoxo."

Yes, these two are pretty comical.

Hilton added on Twitter: "@LadyGaga And I was the one who pulled away from u after I realized what a real-life vampire you are! It's been your M.O. your whole career!"

I have a feeling we haven't heard the last from these two.