Tonight the Top 12 finalists perform live for the nation, vying for the American Idol crown. In this special two-hour show, the contestants will sing their hearts out in hopes of winning America’s vote and surviving another week in the competition.Tonight's theme is: Diana Ross songs Performing Tonight are:Blake LewisBrandon RogersChris RichardsonChris SlighPhil StaceySanjaya Malakar Gina GlocksenHaley ScarnatoJordin SparksLakisha JonesMelinda DoolittleStephanie Edwards