New York, June 22 : Rihanna is finally all set to break four months of silence, and to testify about her alleged beating by boyfriend Chris Brown.

The `Umbrella' hit-maker could face a deluge of questions about the choking, biting and "barrage of punches" she allegedly received during a violent pre-Grammy night lovers'' quarrel last February.

Prosecutors have subpoenaed the 21-year-old singer, so that they can have sufficient evidence to try Brown on felony charges of assault and making criminal threats.

However, R `n' B star Brown, 20, has pleaded not guilty.

"(The subpoena) is not a guarantee they will call her as a witness, but I fully expect that they will. She will testify truthfully," the New York Daily News quoted Rihanna''s lawyer Donald Etra as saying. (ANI)