2:51 Nightcore - Heart Attack (Switching Vocals) - (Lyrics) 3:01 Nightcore - Heart Attack (Switching Vocals) 3:54 \"Heart Attack\" - Demi Lovato (Sam Tsui & Chrissy Costanza of ATC) 3:24 °Nightcore° - Heart Attack (Switching Vocals) 3:01 Nightcore - Heart Attack (Switching Vocals) || Lyrics 3:33 Demi Lovato, David Michael Frank (Future Sunsets) - Heart Attack (Vocal/MV mix) 3:08 ♪ Nightcore - Just Like Fire / Heart Attack (Switching Vocals) 3:19 Y&R News: Sharon Newman suffers heart attack 3:30 Demi Lovato - Heart Attack (Lyrics) 3:15 Nightcore - Cake x Heart Attack (Switching Vocals) 2:51 -Nightcore : Heart Attack ( switching vocals ) 4:01 Heart Attack ||GLMV|| (switching vocals) [ read desc] 3:13 Heart attack (Rock Version) - Nightcore 2:24 「Nightcore」 Heart Attack switching vocals 3:11 [Nightcore] Heart Attack (Switching Vocals) 3:12 Nightcore | Trouble ✗ Heart Attack (Switching Vocals) 3:03 Nightcore - Heart Attack (Lyrics) (Demi Lovato)