Want to know how you can have fun trolling Beliebers (that's what Justin Bieber fans like to call themselves)? This Bieber look-alike was staying at the same hotel the popstar was in and decided to fool the fans outside by waving to them. The fans scream in joy -- but don't realize it's not the real Biebs.

Filmed by his cousin using the dreaded vertical video format, the poser, who does resemble the Canadian icon from certain angles, walks slowly up to his hotel window and waves to the fans down below. Given how high up the hotel room is, it's easy to see why the young fans think they are screaming for the real Bieber.

Trolling level 99, but funny none the less.