Disney pop star Demi Lovato used Twitter when launching her new video “Heart Attack”. Fans were instructed to tweet the lyrics and when it reached certain numbers the video was released. She succeeded and #unlockheartattack actually became the top worldwide Twitter trend for several hours. Twitter is also a part of the video as it consists of Lovato-specific global Twitter trends.

Yahoo Music: Hordes Of Fans Unlock–And Create–Demi Lovato’s New Lyric Video For ‘Heart Attack’