Hey Katy Perry fans - leading up to the VMAs, MTV and Pepsi allowed you to unlock exclusive content from Katy Perry's new album PRISM including samples of two of her brand new tracks, "Dark Horse" and "Walking on Air." You voted chose "Dark Horse" to be Katy next early release, and Pepsi is giving you the chance to get free downloads of the track when it's released on iTunes on 9/17!

Watch the videos above and follow Katy, MTV and Pepsi for exclusive music, offers and updates. Head to pepsi.mtv.com to learn more.