Justin Bieber invaded the TD Garden on Saturday night, and played to a sold out crowd. Those that were there got to see Bieber break out this cover tune.

Thanks to some fan shot footage, we are all able to enjoy this song. We have to say, Bieber didn't do to bad. Not a bad job at all.

Sometimes we forget that he got his start on YouTube playing guitar. However, we wonder what Mr.Timberlake thinks of this tribute?