Demi Lovato: 'Heart Attack' Lyric Video -- Watch Now!

Demi Lovatos lyric video for new single Heart Attack is out!

Think you guys can unlock the lyric video for Heart Attack?! the 20-year-old musician tweeted to her fans, offering them a challenge.

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She added, You guys did it!!! Heres the lyric video for Heart Attack.

The notes section of the video reads, Made with the hundreds of Twitter Trends that Demis fans have started in the past year. Thank you all. #HEARTATTACK.

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