Sia , who is vegan , participated in an advertisement for PETA Asia-Pacific , with her dog , Pantera , to encourage pet neutering . Sia has also joined other publicly known figures for the " Oscar 's Law " campaign , in protest against large-scale pet breeding . Other advocates include singers Jon Stevens , Paul Dempsey , Rachael Leahcar and Missy Higgins . She is also a supporter of the Beagle Freedom Project , performing " I 'm in Here " live at the Beagle Freedom Project Gala on 9 September 2013 . For her 2016 Nostalgic for the Present Tour , Sia partnered with various rescue organizations to conduct a dog adoption fair at each of her concerts . Sia was nominated for a 2016 Libby Award for " Best Voice for Animals " . The video for her 2016 single " The Greatest " was a pro-LGBT tribute to the 49 people killed in the Pulse Orlando Shooting
Pulse Orlando Shooting
Orlando nightclub shooting
Sia (musician)