Kelly Clarkson Crushes Her Halloween Costume

Kelly Clarkson knows how to cover a song — probably because she started her career singing other people's tunes on American Idol, and because she has the voice of an angel. But she also knows how to do a Halloween costume. Lucky for fans, the singer showcased both skills via a Facebook Live stream on Friday. Although the Idol alum only showed her costume from the neck up, it's all anyone really needed to get the gist. By the looks of that iconic, blunt-banged "anti-fame manifesto" wig, Clarkson's Sia Halloween get-up was clear.

"Hey, what's up I'm Sia this Halloween. She’s one of my favorites so I thought I’d wear a wig and be Sia," Clarkson said, before belting out a slow, a cappella cover of “Chandelier" (in which, the lyrics are finally audible). Leave it to Clarkson to up the ante on a costume by adding her own vocal twist. Not only can Clarkson look like Sia, she can sing like her too. Even though she sort of apologized for being tired during the video ("That's me at 7 p.m. after a full day of work, so there you go, Sia. Hope you liked it."), Clarkson crushed the song, all while continuing to don the wig and smile through the lyrics.

After she wrapped, Clarkson paid further tribute to Sia — and her wig. "I don’t know how she does this, because, you know, she can’t see." Then she added, "But it’s also kind of awesome because you’re in your own little world when you’re performing!”

Watch Clarkson kill it in her own little world below:

Clarkson ended the stream with a sweet "y'all have a good Happy Halloween" in her charming Southern drawl, while still wearing the wig. In fact, Clarkson wore the wig through the entire stream, even while she was explaining her annual Christmas benefit concert, "Miracle on Broadway." Maybe she'll just never take it off. Maybe she'll just become Sia. Or Sia will become her? Or they are already the same person? (Honestly, I wouldn't put it past Sia.)

Either way, it's nice to see this kind of dedication to a Halloween costume. And to see Clarkson still doing what she does best — covering the hell out of hit songs.