Katy Perry Teaser Video for 'Firework'

It's becoming popular, apparently, for music videos to have their own trailers before the official release. I just found one for Katy Perry's new single Firework, the third one from her recently released album Teenage Dream. I was not hyped up about it, but the 30-second teaser shows what could be a very energetic and empowering message behind the song.