Justin Bieber defeats boxing with jiu-jitsu

Complex Magazine's cover story this month explains that pop stardom is a contact sport, but at age 18 Justin Bieber knows how to roll with the punches. The son of an amateur Muay Thai fighter, Bieber has trained - to some extent - in MMA, and in this video and image gallery, takes on two heavyweight fighters, while wearing a tuxedo, and beats them with an armbar.
Dunno what it all means exactly?