Katy Perry's video for "Firework" isn't just about a bunch of sparks flying from people's chests. There is actually some meaning behind all those explosions.
The concept was simple: "I was thinking about how it takes just a little spark to make something as big as a firework," Katy says. For the video, the "Teenage Dream" singer took it up a notch, launching a contest looking for kids who did something out of the ordinary to overcome their difficulties, then flying 250 of them to Budapest for the video shoot. Katy told us how she picked the winners. Watch now »