Is Sia writing for Madonna’s next album?

On the May 19 episode of “The Ellen DeGeneres Show,” Sia uniquely recreated her buzzworthy music video for “Chandelier.” In DeGeneres’ introduction of the performance, she said that Sia had “written No. 1 hits for artists like Madonna, Rihanna and Beyonce…” That made us pause, considering Madonna has not yet released a tune written by…

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