Unbelieberable! Check out the above video of Justin Bieber proving what an unflappable professional he is after a fan rushed up to him on stage at his concert in Dubai.

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Though Justin didn't see the fan coming, security did. They immediately tackled the person to the ground. In the process, they knocked over the giant baby grand piano Justin was sitting at just seconds before!

JB calmly moved to another side of the stage and continued performing even as his security team dragged the assailant by him and to the backstage area.

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Watch this Vine video of his crew trying to upright the piano while Justin smoothly carries on:

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