'The Voice' Recap: The Band Perry Drops By As Battle Rounds Begin

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Shakira and Blake Shelton perform on The Voice

It's out with the blind auditions and in with the battle rounds on "The Voice," where coaches pair off their contestants and challenge them to out-sing the other in a sudden-death duet. Each coach invites a fellow musician for help as guest mentor, and also has the option to "steal" whatever performer is cast off by another team.

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Shakira made good on her promise to her country contestants and called Miranda Lambert in as her guest mentor, while Adam Levine was aided by Aloe Blacc, Usher by Jill Scott, and Blake Shelton by The Band Perry -- the first band to ever stop by "The Voice" as a guest mentor.

See who came out victorious during Monday night’s battles over at THR.com.