Justin Bieber recently cut his hair short and dyed it blond.
Some of that Shady attitude must have rubbed off, because the pint sized Canadian got into a fist fight with a much larger guy last night in Cleveland, after the Cavs-Warriors game.
It's unclear exactly what's going on, but you can see Bieber getting clocked -- and clocking his assailant right back.
Whatever it is, it's certainly a lot more serious than his violent dust up with his "brother" Post Malone earlier this year.
Update: This is allegedly the guy who punched Bieber: