Which actress won an Oscar for playing June Carter Cash in 'Walk the Line'?

Which actress won an Oscar for playing Erin Brockovich? Which actress won an Oscar for 'Million Dollar Baby'? Which actress won an Oscar for 'Monster' (2003)? Which actress became the first Black woman to win the Academy Award for Best Actress, for 'Monster's Ball'? Which actress won an Oscar for playing Fantine in 'Les Misérables' (2012)? Which actress won an Oscar for playing Édith Piaf in 'La Vie en Rose'? Who was the first Black actor to win the Academy Award for Best Actor, for 'Lilies of the Field' (1963)? Who was the first Black performer to win an Academy Award, for 'Gone with the Wind'?