Rihanna showed the 'American Idol' contestants on Wednesday exactly what it takes to be a massive star: Stage presence, grandeur and a daring blend of sex appeal, wardrobe and attitude. The songstress took to the 'Idol' stage in a staggeringly-tight PVC catsuit, belting out her new single, 'Rockstar 101.' During her performance, Rihanna prowled the stage amid pyrotechnic blasts, eventually breaking out a guitar and riffing for the world to see. Watch the video after the jump!