WATCH: Sia Releases New Music Video For Her Single ‘The Greatest’ Kingston, ON, Canada / 104.3 Fresh Radio MK September 06, 2016 12:01 pm Sia is at it again! The amazing singer-songwriter just released her newest music video for her song ‘The Greatest’. Of COURSE, the song features Dance Moms star Maddie Ziegler, who has danced in many of Sia’s music videos. Check it out! Follow us on Twitter! Find us on Facebook!