RihannaSubpeonaed.jpgIt's official!

Rihanna will have to tell her side of the story in court at Chris Brown's upcoming preliminary hearing.

"Rihanna was served at my office by LA DA investigators," Etra said.

"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."

The preliminary hearing is set for June 22nd.