Ani DiFranco, Me'Shell Ndegeocello and Spearhead's Michael Franti will perform at a concert on September 19 at the Berkeley Community Theater in Berkeley, California, as part of a benefit for the state's Coalition for Women Prisoners and the Prison Activist Resource Center.

Christened the "Critical Resistance: Music and Solidarity" concert by organizer and infamous Black Liberation Movement activist Angela Davis, the show will focus on reforming the criminal justice system and the need to increase public spending for the construction of new schools rather than new prisons.

Joining DiFranco, Ndegeocello and Franti onstage for the concert will be Sioux poet and musician John Trudell, who helped form the American Indian Movement in the 1970s.

The Berkeley performance will also mark the first date of sorts for DiFranco's fall tour in support of her newest album, "Little Plastic Castle," while Ndegeocello plans to head into a studio soon to start work on her third album.