Justin Bieber's strange behavior in a video that is currently circulating everywhere has raised doubts about his health. Singer under the effect of narcotic substances ? That's the question everyone is doing!

As he is in New York and stopped for a few moments beside his admirers, Justin appears to be the first, wholly involuntary move.

A handshake completely out of control, then shaking the body while closing the video embraces a fan and does not stop rubbing her back. For more follow the video: