Kelly Clarkson is Sia for Hallowen, covers 'Chandelier' like it's no big deal

This is definitely no cheap thrill! Kelly Clarkson is indeed the greatest...okay, enough with the Sia song puns already.

Very few people can nail Sia's 'Chandelier' – lord knows how many talent show contestants have tried – but Kelly, 34, completely smashed it out of the ballpark in a live performance on her Facebook.

The former American Idol winner wore Sia's iconic blonde wig, telling fans: "I'm Sia this Halloween. What? She's one of my favourites so I thought I'd wear a wig and be Sia."

And then came THAT voice singing 'Chandelier'. Wait, belting is probably a better term for it.

After swinging from the chandeliers (vocally, at least), the-mother-of-two mused about Sia's wig: "I don't know how she does this 'cause you know, you can't see. But it's also kind awesome cause you're in your own little world when you're performing."

If you're wondering about the backdrop behind Kelly, it's her "succulent wall" for her masquerade ball being held overnight. Hopefully Sia scored an invite.