It's almost Halloween and Kelly Clarkson is wigging out—literally!

The Piece by Piece performer treated fans to a rather impromptu Facebook Live performance on Friday, October 28, using the social media site to cover Australian pop star Sia's beloved sad party girl anthem, "Chandelier."

Wearing a bluntly-chopped white-blonde wig covering half her face, Clarkson giddily announced, "Welcome! Hey, what's up? I'm Sia this Halloween. What?!"

"She's one of my favorites, so I thought I'd wear a wig and be Sia," she continued from her greenhouse in Tennessee, as her husband filmed. "I'm gonna cover a Sia song right here real quick, and I'm gonna talk to you. I've had a full day in New York, and now I'm back in Tennessee, and this is our succulent wall that we're having for our masquerade ball that we're having tomorrow night. We're having a big party, and anyway, I thought I'd sing in this beautiful greenhouse."

Before belting out the powerful jam, the American Idol album expressed her desire to do the song justice for the famed singer-songwriter, giving its original artist a shout out.

"Here you go, Sia," she said. I hope you like it!"

Watch Clarkson slay the tune, below:

Yes, Sia Has a Face and This Is What It Looks Like: