Sia may be a musical genius, but what does she look like under that huge bow? Turns out, really different. The 40-year-old singer recently performed at the Apple Keynote 2016 event and ...

Guetta himself then emerged onstage and, moments later, the pair were joined Sia, wearing one of her trademark wigs and giant bow that obscured her face. Although the track was credited to only Guetta ...

The surprise performance of the 2011 classic happened on the festival's main stage during a headlining set by Afrojack.

Wearing a voluminous pink taffeta dress and a pink bow to match, Sia then launched into the song, with the crowd screaming along to every word and Guetta and Afrojack hugging behind the decks.