Sporting a sweet purple leather jacket and geek glasses, Bieber fitted right in alongside some of the most fashionable women in the world who all turned out to support their favourite designers.
Amongst those out in force in New York was Nicki Minaj who was seen rocking an amazing Oriental style outfit complete with green eyeshadow and hair pins. We're not sure if she looks more elegant or lethal but either way we love it.
No fashion event is complete without Sarah Jessica Parker or Alexa Chung and they were both in New York last night too.
Take a look through the New York Fashion Night Out pictures above and be sure to check out Cher Lloyd, Tulisa, Gwyneth Paltrow and more at the London event.