Katy Perry 'Part of Me' 3D (Official Trailer)

The first trailer for Katy Perry: Part of Me, the unofficial thematic sequel to Justin Bieber: Never Say Never that mixes the inspirational message of a Katy Perry puff piece with the garish candy-coating of a Katy Perry 3D concert. If you didn't know already, you will take away from this trailer just how long Perry struggled to become a pop star, and how hard she continues to work at