How Has Usher Changed The Dynamic On 'The Voice' Season 4?

Access Hollywood Season 0 5:23 mins

Usher and Blake Shelton chat with Access about Usher joining "The Voice" for Season 4. How has his presence changed the dynamic of the show? And, as a fan of the show before joining, was Usher nervous about how he'd get along with the other coaches? Plus, how is Blake getting along with Shakira?

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