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Not everyone's a fan of the Biebs! Justin Bieber found himself among a throng of non Beleibers when he took to the stage with model Laura Stone during New York Fashion Week's Fashion Rocks event -- and got booed!

Apparently JB came onstage, fully dressed, and was met by a jeering crowd. Of course like any cocksure 20-year-old, who is internationally famous for both his singing and partying career -- he decided to attempt to silence the crowd by taking off his pants.

"I don't feel comfortable unless I'm in my Calvins. So, what's up? Is that cool?"

Then the constantly disrobing singer did what he does best -- and disrobed. We wonder how much Calvin Klein brand ambassador paid for that shout out? Probably a truck load of Calvins for life.

Along with an Instagram pic of the incident, the "Boyfriend" singer wrote, "Just stripped on national television hahahaha it wasn't planned lmao."

Taking off your pants on national TV? Just sounds like a Tuesday in Bieberland if you ask us!