Mark Geragos, the lawyer representing Kesha in her sexual assault claim against super-producer Lukasz "Dr. Luke" Gottwald, claimed on Twitter yesterday that Luke was also the record producer who raped Lady Gaga when she was 19.

Gaga told the story of the attack and how it affected her on the Howard Stern Show yesterday.

After the news of that alleged assault broke, Geragos invited his Twitter followers to "guess who the rapist was" and "#namethepervert." When someone guessed Dr. Luke, Geragos replied "#bingo."

Representatives for Luke and Gaga both denied Geragos' claims in statements to TMZ.

"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," Dr. Luke's rep said, "He has never been alone with her and never touched her. Neither meeting was in that time frame reported."

Gaga hasn't named the man who assaulted her, but she says it wasn't Dr. Luke. Her rep confirmed Geragos's allegations are "absolutely not true."

But Geragos is sticking to his guns. He hasn't deleted his tweets, and claims "I said it because it's true."

He says he intends to depose Lady Gaga in Kesha's suit against Luke, and claims 3 other "not as famous" women have also come forward with allegations against the producer.

"The Dr. Luke lawsuit is utterly incomprehensible. This simply isn't true and how dare someone take advantage of such a sensitive matter," Gaga said through a rep.

[h/t E! Online, Photo: Getty Images]