Check out Justin Bieber's performance on Dancing With the Stars!

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Hey M Girls!

Justin Bieber sang "As Long As You Love Me" last night on Dancing With The Stars and he totally had the ballroom rockin' as he broke it down with his dancers --he even showed off his arm muscles to the crowd!

If you missed Bieb's performance, check out this video:

Let's dish: -What did you think of Justin's performance?

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