5:45 AM PT -- A longtime Parisian criminal defense lawyer tells TMZ, Chris has effectively been arrested. Within 2 days he must either be released or appear in court, where a prosecutor can ask the judge to either keep Brown in custody pending trial or let him go free with "obligations." If Brown's released with obligations, we're told he could be required to surrender his passport to French authorities and would remain in Paris pending trial, which typically takes a year.

The lawyer adds Brown could be required to go to the police station every 2 weeks to ensure he's still in France.

Chris Brown and two members of his team have been arrested by French police after a woman claims she was raped by the singer in a hotel.

French authorities confirm to TMZ Brown has been detained and is in custody for alleged aggravated rape and narcotics offenses. Authorities went on to say he is being processed, which is the French version of being arrested and booked.

The woman says she met Brown overnight between January 15-16 at club Le Crystal and then headed back to the Mandarin Oriental Hotel with the singer where she claims to have been raped.

Investigators have two days to decide to file preliminary charges or to let Brown go.

Chris was spotted at Le Cirque Club in Paris Saturday night -- just three days after the alleged rape -- with Ammika Harris, a woman who he is reportedly dating.

Brown was prosecuted for felony assault and making criminal threats after he brutally attacked Rihanna in Los Angeles. The beating left Rihanna with visible facial injuries to her eyes and mouth which required hospitalization.

Brown later pled guilty to a felony and was sentenced to community service, 5 years probation and domestic violence counseling.

Brown was sued back in May by a woman who claimed she was raped at a party at the singer's home. The woman claimed Brown supplied party attendees with Molly, cocaine and weed and that it was one of his friends who raped her.

The LAPD investigated the woman's claim after she filed a report, but could not determine if the sex was forced or consensual. The lawsuit is ongoing.