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"Heart Attack" is a song by recorded by American singer Demi Lovato for her fourth studio album DEMI (2013). It was released on February 24, 2013, by Hollywood Records as the lead single from the album. The song was written by Sean Douglas, Nikki Williams, Aaron Phillips and Lovato, with the song's producers Mitch Allan and Jason Evigan. "Heart Attack" is an electropop song that employs cardiac arrest as a metaphor for lovesickness. The single debuted at number 12 on the Billboard Hot 100.
Now I'm a warrior
Now I've got thicker skin
I'm a warrior
I'm stronger than I've ever been