By Stephen Pate – Sia was the surprise musical guest at Apple’s September 2016 iPhone event.

Updated – after Apple ordered the video takedown. Then the video was reposted on Vevo.

Along with her regular dancer Maddie Ziegler she performed her new song The Greatest which was just release this week.

The song featured a back screen and split screen of the official video with the live performance.

After that, Sia performed her first huge hit “Chandelier.”

Sia always delivers a top performance, Ziegler was her usually energetic and creative self and the split screen was cool.

Thanks to Apple for presenting her and showing off the new iPhone 7 and Apple Watch Series 2. Awesome new toys.

Sia is back in North America on the last part of her international Nostalgic For The Present tour.

Get The Greatest on iTunes now – The Greatest (feat. Kendrick Lamar) – Single – Sia and Amazon.com.

Sia’s worldwide Nostalgic For The Present tour is still underway. Check for tour cities and dates. Next date is Cleveland Ohio September 10th.

For more about her career and life, check out Wikipedia.  Sia’s fan site is siamusic.net.