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Courtesy: Bad Boy

Justin Bieber may be only 16 years old, but the teen singing sensation is already recording tracks with some of the biggest music icons in the business ... including P. Diddy. Check out Justin trying to look hard in this Dirty Money jacket. Priceless.

While Diddy has been promoting his newest album Last Train To Paris in New York, Biebs jumped in the studio with the rapper because the teen needed to get a song idea, "off his chest," according to MTV.

As for their relationship, Biebs and Diddy met last year at the 2009 MTV Video Music Award's. Soon after, Puffy made him an honorary member of his group Diddy Dirty Money ... and even bought the pop star a white Lamborghini Gallardo worth $200,000!

We're looking forward to seeing what these two superstars cook up in the studio. One things for sure ... it's good to be Bieber!