A group of very lucky young ladies got the best surprise ever when they went to preview a new dance video game.
The girls were under the impression that they were trying out 'Just Dance 4' as part of a focus group. They had no idea Justin Bieber was actually behind a one-way mirror checking out their moves! L-O-L!
Of course all of the girls freaked out when they saw the Biebs and one even started to cry! Justin tried his best to make everyone laugh when he attempted various silly ways to enter the room.
After he surprised them, he posed for pictures and played the new video game with them.
Watch the entire thing go down in the YouTube video posted below!
What would you have done if you were those girls?!
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