Not one bit, according to her lawyer.
"She's fine," attorney Donald Etra tells E! News. "She's fully expecting she'll be required to testify. She will answer all questions asked of her truthfully."
Rihanna was spotted in New York as recently as Thursday evening, but Etra says, "She will be here in time for the hearing."
Monday's preliminary hearing will feature prosecutors outlining their evidence against Brown, who has pleaded not guilty to assaulting and threatening Rihanna. She was subpoenaed back in May to testify. At the end of the hearing, Los Angeles Superior Judge Patricia Schnegg will determine if the case is solid enough to proceed to trial.
While it promises to be dramatic, the Brown-Rihanna face-off will not be televised. On Thursday, the judge announced she had banned media outlets from bringing cameras inside the courtroom.