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The Boston Globe

Music

Music Review

Maroon 5, Kelly Clarkson perfect at work, play

MANSFIELD — For a whole host of reasons — from technical cues to curfews to having the right guitar for each song — big shows tend to run with a clockwork-like efficiency.

But as Maroon 5 and Kelly Clarkson raucously proved here Friday night, some of the best moments at a live concert remain unscripted.

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