Justin Bieber Reaches Breaking Point .... Storms Offstage

Justin Bieber lost it Thursday, pitching a fit during his performance and storming offstage.

It went down in Oslo during a TV performance. One of his fans spilled something on the stage and Justin tried mopping it up but someone blocked him, and that was it.

It's the second meltdown in 24 hours. On Wednesday, he walked off a radio show.

Bieber just posted a statement, saying he's had a rough week with no sleep, adding, "I don't always handle things the right way but I'm human and I'm working on getting beer at responding not reacting."

As for "beer," we think he meant "better."

The Oslo fans haven't given up ... they're still at the TV studio, serenading him with "Baby."