Bieber managed to free himself and ran to the side of the stage while security guards grabbed the intruder, knocking the piano over and onto its side.

BBC: Justin Bieber tackled by fan during Dubai stage show

The video showed the men in front of a wall, with four standing and four kneeling, and hooded guards stood on each side.

CNN: Video:?8 Chinese?hostages?in Iraq

But as he trudges from one international pow-wow to another, he must envy colleagues like Britain's Tony Blair who do not have invisible federal guards hovering at their side.

ECONOMIST: Germany