Sia Performs ‘The Greatest’ Live at Apple Keynote Speech

We Can Survive 2014

40-year-old singer Sia takes to the stage alongside 13-year-old dancer Maddie Ziegler at the Bill Graham Civic Auditorium in San Francisco, CA, today.

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Ziegler, who has performed in several of Sia’s music videos was on hand to help the singer debut ‘The Greatest’ for the very first time in addition to a performance of her hit single ‘Chandelier’ at the Apple Keynote.

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Watch the entire performance below and let us know what you think:

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