Meek Mill is expected to testify in Philadelphia as he fights to avoid jail for what prosecutors call a steady stream of parole violations.
They say the 28-year-old rapper has failed to keep parole officials informed of his travels and submitted a suspect urine sample.
Defense lawyers blame the lapses on the “chaos” of the music industry.
The man born Robert Williams has a famous supporter in his corner: girlfriend Nicki Minaj.
The 33-year-old singer has told the court that she wants to bring more structure to his life. And defense lawyer Frank DeSimone said the couple is seriously discussing marriage.
Williams grew up in impoverished North Philadelphia and lost his father as a child.
He has been on parole for years over a 2009 drug and gun conviction.