Justin Bieber-mania hit a fever pitch Tuesday night, as cameras rolled on the teen idol's upcoming 3-D film shooting at New York's famed Madison Square Garden, featuring cameos from stars such as Usher, Ludacris, Sean Kingston, and last but not least, Miley Cyrus.

Bieber Tweeted before the show, "Its all really coming 2gether. Tonight I perform with my heroes! MSG its almost time!"

And com