The music video for Demi Lovato's "Heart Attack" drops tomorrow, but you can get a sneak peek of it here today! Demi released the two teaser trailers this weekend, and each one shows a different look. The producer revealed that Demi put her own stamp on the song. "She came in to record it and then she actually had a couple of lyric changes that were really good," he said. "She added that super high note at the end and she added some really cool things to it and she brought that song to life!" Her self-titled album Demi drops on May 14th! Check out the two teasers below!