Man Tries to Attack Justin Bieber Onstage

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A man briefly interrupted a concert performance by Justin Bieber Sunday in Dubai when he stormed the stage and tried to grab the pop star. 

A source close to the 19-year-old singer tells ET that the man ran onstage while Bieber was at the piano performing his hit Believe and tried to grab him. 

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The source said the piano was knocked over during the incident, but the  crazed fan was quickly detained by security personnel and Bieber continued the show. Click HERE to see video of the attempted attack.

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