7. Christina Aguilera
Everything we have seen from Christina Aguilera in her role as a coach on The Voice drives us crazy. Her comments are useless. Her expressions of disgust are so blatant that they manage to distract us from Cee Lo's outfits. Her attempts to undermine other coaches are pathetic. Her responses to the performances of gorgeous women (Hey, Amanda Brown!) highlight her vast insecurities. And those alternating streaks of pink, purple, and rainbow in her hair! WTF! Back off the highlighter, lady. There's lots of gossip about Christina's diva-like antics on set. True, false, it doesn't matter. We've seen enough. Keep that genie in her bottle.