It was the third year in a row that the singer-songwriter has won this particular award - the only artist to achieve such a feat.
Sia also won the APRA Song of the Year for her hit Chandelier, co-written by Jesse Shatkin, beating Sheppard (Geronimo), Dan Sultan (Kimberley Calling), The Veronicas and DNA (You Ruined Me) and Kasey Chambers and Bernard Fanning (Bittersweet).
Apra Music Award winners:
Song of the Year: Chandelier - Sia
Songwriter of the Year: Sia
Breakthrough Songwriter of the Year: 5 Seconds of Summer
Outstanding Services to Australian Music: Fifa Riccobono
Most Played Australian Work: Geronimo - Sheppard
Blues & Roots Work of the Year: Heart Beats Slow - Angus & Julia Stone
Country Work of the Year: Give Her the World
Dance Work of the Year: Swing (Joel Fletcher Remix) - Joel Fletcher feat. Savage
Pop Work of the Year: Geronimo - Sheppard
Rock Work of the Year: Love You Deserve - Stonefield
Urban Work of the Year: Tightrope - Illy feat. Scarlett Stevens
Most Played Australian Work Overseas: Somebody That I Used To Know - Gotye featuring Kimbra
International Work of the Year: Happy - Pharrell Williams
- nzherald.co.nz with AAP