The trio's surprise performance of the 2011 classic "Titanium" happened on the festival's mainstage during Afrojack's ...

Sia’s divorce is taking a complicated turn as her estranged husband, Daniel Bernad, is officially requesting spousal support.

Miami’s Ultra Music Festival witnessed pop music history Friday night as David Guetta, Afrojack, and Sia appeared onstage to perform their 2011 hit “Titanium” live together for the first time.

Sia and David Guetta have plenty of collaborations together, but 2011’s “Titanium” is one of the biggest. On Friday (Mar. 28), the pair performed the hit for the first time at the Ultra Music Festival ...

Afrojack, Sia and David Guetta. CREDIT: Tim Mosenfelder/Getty Images, Michael Loccisano/Getty Images for Coachella and Joseph Okpako/WireImage Afrojack began to play a snippet of Guetta’s ...