Justin Bieber performed in Times Square this New Year's Eve infront of thousands of people, as part of Dick Clark's New Year's Rockin' Eve - a show we thought was made up as part of Friends until THIS VERY MORNING.

He headed down earlier in the day to rehearse in the cold and a giant coat.

Justin Bieber rehearsing for Dick Clark's New Years Rockin Eve 2011 / 2012

Bieber performed Let It Be and with Carlos Santana as part of the celebrations. Check out the video;

Lady Gaga and Pitbull also performed before the giant ball dropped at midnight.

Justin Bieber Dick Clark's New Year's Rockin Eve 2011 / 2012

How did you guys celebrate?

PICS: PA / WENN