Demi Lovato "Heart Attack" (NEW MUSIC)

She's back! 

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After much anticipation and a little teasing, Demi Lovato finally releases the full version of her latest smash "Heart Attack."

The 20-year-old X-Factor judge premiered her new single on Ryan Seacrest's site yesterday, which attracted so much attention that she basically crashed his site. 

"Never put my life out on the line/ never said yes to the right guy/ never had trouble getting what I want/but when it comes to you, I'm never good enough," sings Demi. 

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The "Skyscraper" singer is up for another season of X-Factor, so fans can her in action this upcoming season. 

"Heart Attack" is off Demi's forthcoming new album. 

Take a listen to Demi's new pop hit below!