photo via getty.
Chris Brown is being sued by an unnamed woman who was invited to a party at his house back in February.
According to TMZ in the law suit, she claims that she was raped by a friend of Chris, Lowell Grissom, and allegedly forced to perform oral on another woman who was menstruating.
The woman hired Gloria Allred, to represent her. During a news conference Allred said that this was "one of the most horrific sexual assault cases" that she has ever seen.
TMZ was also told that the LAPD investigated the woman's report, but couldn't determine if the sex was forced or consensual.
Chris Brown's lawyer, Mark Geragos, has gotten involved and will appear on "TMZ Live" tomorrow.