3:03 Nightcore - Heart Attack (Lyrics) (Demi Lovato) 2:51 Nightcore - Heart Attack (Switching Vocals) - (Lyrics) 3:00 Nightcore - Heart Attack [Cover] 3:04 (Nightcore) Heart Attack 3:16 Demi Lovato - Heart Attack | Nightcore w/Lyrics 3:01 Nightcore - Heart Attack (Switching Vocals) 3:21 「Nightcore」 Heart Attack - Demi Lovato ♡ (Lyrics) 2:57 Nightcore - Heart Attack 3:13 Heart attack (Rock Version) - Nightcore 3:54 Nightcore - Heart Attack (Rock Version) | Demi Lovato - (Lyrics) 2:56 Nightcore - Heart Attack (rock version) (lyrics) 3:30 Nightcore - Heart Attack [Rock Version] | Demi Lovato [Sped Up] 3:06 Nightcore - Heart Attack (Lyrics) 3:02 Nightcore - Heart attack 3:13 ✪「Nightcore」➥ Heart Attack (Male Version) || Lyrics 3:12 Heart attack - Demi Lovato (speed up + reverb) + (lyrics) 3:08 ♪ Nightcore - Just Like Fire / Heart Attack (Switching Vocals) 3:00 Demi Lovato - Heart Attack - (Speed up + Reverb) 3:07 Heart Attack {Male Version} Nightcore