Oh man… this must have been embarrassing.

Justin Bieber was on-stage in Ari­zona and got a lit­tle sick while singing. In fact, he had drank some milk before­hand… and let it all com­ing flow­ing back on-stage.

Here is the video of it: (WARNING: You can actu­ally see him puk­ing.… so if you woof your cook­ies as a result of watch­ing this, just know that I warned you, lol.)

http://www.youtube.com/watch?v=KY3tLA544r4&feature=player_embedded