#Sia Furler (Musical Artist) #Elastic Heart (Canonical Version) #elastic heart #eleastic #heart #sia #Electropop #acapella #acapellas #a capella #a capellas #a capela #A Cappella (Musical Genre) #accappella #accappellas #acappella #acappellas #accappela #accappelas #pop #Top 40 (Radio Format) #Choir #no instruments #voices only #voice #vocal #Singing (Musical Instrument) #Acappella (Musical Group) #Pop Music (Musical Genre)