Famously hairy pop star Sia has released a stunning new single which pays tribute to the victims of June's tragic shooting at Pulse nightclub in Orlando. The 40-year-old Australian singer, who was previously filmed breaking down on stage as she dedicated her hit 'Titanium' to the 49 LGBT people and allies who lost their lives in the massacre, unveiled new single 'The Greatest' today (September 6), along with a stunning video which once again stars 13-year-old dance prodigy Maddie Ziegler. Ziegler, who previously appeared in Sia's videos for 'Chandelier', 'Elastic Heart', 'Big Girls Cry' and 'Cheap Thrills', sports rainbows on her face as she delivers her most emotional performance yet in the visual, which features 49 young dancers who end their routine with the haunting image of a sea of bodies on the floor, along with the message '#WeAreYourChildren'. The single marks Sia's first original material since the release of seventh studio album This Is Acting in January. Meanwhile, it was revealed in a July that a permanent memorial at Pulse is currently being planned to commemorate the lives of the 49 who died - click here to read more . 'The Greatest (ft. Kendrick Lamar) is out now. Check out the video below: