[Kara + Vietsub] "Heart Attack" - Demi Lovato (Sam Tsui & Chrissy Costanza of ATC) <br />[Kara + Vietsub] "Heart Attack" - Demi Lovato (Sam Tsui & Chrissy Costanza of ATC) <br />[Kara + Vietsub] "Heart Attack" - Demi Lovato (Sam Tsui & Chrissy Costanza of ATC) <br />[Kara + Vietsub] "Heart Attack" - Demi Lovato (Sam Tsui & Chrissy Costanza of ATC)
