Wow.  Not a good couple of days for the Biebs...2 hours late to a concert and getting boo'd, collapsing on stage last night, now completely LOSING it!  Flipping out at a photog and threatening to beat the frack out of him!!

Click HERE to watch the video! (WARNING: NSFW...A LOT of cursing!)

And Click HERE for the full story.

Hey, how about some free Justin Bieber tickets for when he comes to the Tampa Bay Times Forum in August?  Click HERE.