Sia Performs 'Alive' on 'X Factor UK' - Watch Now!

Sia wears her signature black and white wig while heading to the BBC Studios on Tuesday (December 8) in London, England.

The 39-year-old singer performed her hit new song “Alive” on The X Factor UK over the weekend and of course rocked her wig!

A Maddie Ziegler look-alike performed alongside Sia, rumored to be French dancer Julia Spiesser.

Sia also confirmed she would be going on tour, but is not quite sure when. “I don’t know, maybe next year. I don’t know,” Sia said. “I’m waiting for the right number.”

FYI: Sia is wearing a Ports1961 dress.