Singer-songwriter Sia is known for accompanying her hit songs with unique music videos that tell a story.
Her newest single, "The Greatest," has visuals that seem to illustrate a familiar one.
Lone gunman Omar Mateen killed 49 people and wounded 53 others in June in a mass shooting at Pulse nightclub in Orlando, Florida.
Images in the music video for "The Greatest" suggest a tribute to the victims of the massacre.
The first scene of the video shows Maddie Ziegler, who has starred in four other Sia music videos, with rainbow-painted cheeks in place of tears.
The teen leads 48 other children in a dance routine through the halls of a run-down building.
"I'm free to be the greatest, I'm alive; I'm free to be the greatest here tonight, the greatest, the greatest, the greatest alive, the greatest, the greatest alive," Sia sings.
One room in the building has an elevated area that looks like a stage, where children dance, while others dance below. Rainbow disco lights flash in the background.
"Don't give up, I won't give up; don't give up, no, no, no," Sia sings.
The dancing children all fall at once to reveal bullet holes in a wall behind them. Other rooms are shown with fallen children.
By the end of the video, Ziegler is crying.
Though Sia hasn't spoken publicly about the video, Matt Moseley, a dancer who appears in the video, posted on Instagram, saying: "49 beautiful lives lost. This is for you."
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