With so many reality singing competitions on TV, networks keep adding bigger stars to their judging panels in hopes of drawing in more viewers. Case in point? The X Factor featured Britney Spears this season; and American Idol just added Nicki Minaj, Mariah Carey, and Keith Urban. And that's to say nothing of the bevy of stars spinning chairs on The Voice. But big names don't necessarily mean the best judges. Which show do you think has built the most amazing panel? Sound off in our poll below!