Here are four artists who come from completely different musical backgrounds--pop, R&B, country, and rock--and yet somehow their performance isn't a total disjointed mess. It's in fact dang impressive. And Steven Tyler, Randy Jackson, and Jennifer Lopez could never pull it off. (Okay, well, Steven could...but only if he sang solo!)
Does this clip make you want to go crazy for "The Voice"? It's kind of getting me excited. I hope the contestants sing as well as this!
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