Superstar singer Rihanna has appeared for the second straight day at the trial of her partner, rapper A$AP Rocky, and may have outshined key testimony in the case.

One day after a jury was sworn in, opening statements are expected Friday in the Los Angeles trial of rapper A$AP Rocky, who is charged with two counts of assault stemming from allegations he pulled a gun on a hip-hop artist during an altercation in Hollywood and then fired at him soon after in a separate confrontation.

To fans' surprise, Rihanna made a rare public appearance at the rapper's LA court hearing for his alleged shooting trial.

A$AP Rocky, charged with assault for allegedly shooting at a former friend and collaborator, stands trial in downtown Los Angeles.

Pop star Rihanna appeared in a Los Angeles courtroom on Wednesday as her partner, rapper A$AP Rocky, continued his trial on assault charges. The singer, who shares two children with the rapper, sat in the courtroom with A$AP Rocky's family as the trial delved into allegations that he pulled a gun out on his former friend and opened fire multiple times.

Rihanna appeared for the first time at the trial of her longtime partner A$AP Rocky, on the day of its most important testimony — the description by a former friend of the moment Rocky allegedly fired a gun at him.