A Justin Bieber Birthday Card, from Billboard.com

Justin Bieber showcased his rap skills over Cam'ron and Vado's "Speakin' In Tungs" track. Who knew the kid was listening to street rap like this?

Check out Bieber spit over the club smash -- if nothing else, his confidence is definitely through the roof.

Video: Justin Bieber "Speakin' In Tungs" freestyle