Last month the pop star – snapped here looking happy on Tuesday night at a Black Eyed Peas album launch party – was ordered to testify over allegations that ex-boyfriend Chris beat her up.

She has now been served with a subpoena to appear in a Los Angeles courtroom in 10 days time.

Rihanna’s lawyer Donald Etra has confirmed the beauty intends to fully co-operate.

Donald said: “Rihanna was served at my office by DA investigators.

“If the preliminary hearing indeed goes forward, she is now legally required to be there, she will be there and will answer all questions truthfully.”

Chris is accused of battering his lover before a pre-Grammy do in February. She has so far refused to talk about the attack.

In April, Chris pleaded not guilty to one count of assault and one count of making criminal threats related to an alleged domestic violence incident involving Rihanna in February.

The couple briefly got back together after the alleged attack, but have now split up for good.