Barcelona: Justin Bieber really loves his fans. So he punched one of them in the mouth as he sailed by a crowd in his limo. The fan reached into an open window. And that’s the point: the window was OPEN. It wasn’t closed. Bieber was looking for interaction. A nasty piece of work since he was a kid, Bieber — with several arrests and lawsuits to his credit — should get some blow back from this. Maybe even the legal kind. Watch this video- POW! Right in the smacker.