The following video shows how one enterprising young man, who was staying at the same hotel in Switzerland as Bieber, was able to fool hundreds of screaming girls into thinking he was the Biebs.
How did he do it? Simple.
He just went to the roof of the Hotel Hallenstadion in Zürich and put on a baseball cap and started waving to the fans below – and they went wild.
They all thought it was actually Bieber waving at them.
Watch Justin Bieber fans get pranked in Switzerland.