What happened to JB?

Biebs... you got some 'splaining to do!

Justin instagramed this pic of him looking all bashed and beaten up... the only question... what is it for?
I don't exactly see JB as the 'gang basher' type... and I don't think his mum Pattie would ever do something like this... (Although I clearly do remember Justin saying if he misbehaved him 'momma would slap him in the head' haha). I'm guessing it's either for TV or a photoshoot.
The other day JB did tweet:

I guess we'll just have to wait and see! :) What do you think it's from?

Justin & Selena Crash Wedding: UPDATE

An exclusive source recently told PerezHilton.com that Justin Bieber and Selena Gomez were having a romantic dinner date on the beach in Malibu over the weekend when they overheard Justin's music playing at a nearby wedding.

This is what happened:

"Unbeknownst to all of the guests, Justin Bieber and his girlfriend Selena Gomez were just done eating at a restaurant up the road from the Adamson House estate and had decided to take a stroll down the beach. I guess he heard his song play and decided to crash the wedding party to check the scene out. He was cool enough to make a cameo, which surprised all of the wedding guests. He even took the microphone, congratulated the newlywed couple, and said a few nice words, while posing for a series of pictures with his fans. That was one of the coolest and nicest things a person of his celebrity can do, and it certainly made a memorable night for the newlywed couple Mrs. and Mrs. Rob and Jeanine McCool."

That. is. so. McCool. (see what I did there?)
This newlywed couple are relatives of lucky belieber Paige Conway. While twitter is going mad with hate and tinges of jealousy towards Paige, it was just pure luck and coincidence she was at this wedding!  
I gotta say, I would completely FREAK OUT if any celeb crashed an occasion I was at... especially Biebs!!!