The music video that accompanies Sia's new song "The Greatest" is an incredibly moving tribute to the Orlando massacre.

Sia has released a music video to accompany her new song, "The Greatest," and it's a hauntingly beautiful tribute to the Orlando shooting victims.

The singer, known mostly for not being known at all (i.e. hiding behind enormous wigs and not starring in any of her own music videos) teamed up with her 13-year-old muse dancer Maddie Ziegler to create an emotional tribute to the victims of the Pulse nightclub shooting in Orlando.

The video wastes no time in grabbing the viewer's attention as it flashes #WeAreYourChildren across a black screen. We're hooked as we are exposed to the assumed dead children's bodies lying on the floor and Ziegler using her fingers to paint rainbow tear stains on her cheeks — imagery that powerfully and clearly represents the LGBT community that comprised most of Pulse's audience.

The 49 bodies — one for each victim in the tragedy — appear to come back to life soon after, beginning the next five minutes of emotionally-wrenching dancing in a prison-like setting, symbolizing the entrapment the victims must have felt in the moments before their death.