The Biebs is scheduled to give a free mini-concert at 8:30 Friday morning outside Rockefeller Center.

 

And, as expected, hundreds of young girls were already camped outside 30 Rock Thursday afternoon. The line of excited teens, sitting on blankets and in lawn chairs, stretched along 49th Street in Midtown.

 

Bieber will perform as part of the "Today" show on Friday morning.