Justin Bieber Re-Tweets Lyrics to Carly Rae Jepsen Duet

Justin Bieber stops to say hi to some fans outside a recording studio in Los Angeles on Saturday afternoon (September 1).

The 18-year-old musician wore a pair of red pants with money patches over the knees.

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“tweeted July 30 2011 – “what makes you so beautiful is that you dont know how beautiful you are… to me” now #KISS @carlyraejepsen #Sept18″ Justin re-posted onto his Twitter.

The lyrics have been uncovered as lyrics to his duet with Carly Rae Jepsen! Check out her track listing for Kiss on JJJ.

10+ pics inside…