Chris Brown is facing a new lawsuit after a woman alleged that she was raped and held against her will at the singer's house in California.

The woman was repeatedly raped by a friend of Brown's during a drug- and alcohol-fueled party at Brown's residence last year.

High-profile women's rights lawyer Gloria Allred filed the suit against Brown on May 9 on behalf of a woman who says she was raped by Brown's friend Young Lo, whose real name is Lowell Grissom Jr. The New York Times reports he's also named as defendant in the suit.

Woman Raped At Chris Brown's House

The woman, called Jane Doe for privacy reasons, is also suing a woman whom she says forced her to perform a sexual act. The female defendant is referred to as Doe X because the accuser doesn't know her real name. There are 50 other people who are listed as defendants, but all unnamed because the plaintiff isn't privy to their actual names.

"This is one of the most horrific cases involving alleged sexual assaults that I have ever seen," said Allred during a news conference, adding that her client had been "severely traumatized."

Allred recounted what happened between the night of Feb. 23 and the early morning of Feb. 24 last year when the accuser attended a concert at West Hollywood nightclub 1 Oak.

The client was invited to attend an after-party at a recording studio with Brown and Grissom Jr. when her phone was confiscated. When the woman asked for her phone back and said she wanted to leave, Grissom Jr. told her she didn't need it because the party was moving to Brown's home in Los Angeles.

"She was forced to go to Brown's home," said Allred, where the singer provided guests with alcohol and illegal drugs, including cocaine, marijuana, and molly. "Brown handed each female guest a clear pill filled with white powder and instructed them to take it to have a good time."

The accuser said she declined the pill.

No Escape

At one point between evening and early morning, the plaintiff said she was confined to a bedroom and was sexually assaulted. Brown is not named as the rapist but he allegedly blocked the door with a sofa so the plaintiff would not be able to escape.

No charges have been filed against Brown or Grissom Jr.

Mark Geragos, Brown's attorney, said that before filing the lawsuit, Allred and her client had demanded $17 million from Brown, which Geragos rejected.

"My investigation shows that none of these allegations are true," he said. "Chris is a target."

"I never made a demand for any amount of compensation whatsoever, let alone a demand for $17 million," Allred said.