Give Sia any song, and she's sure to kill it. That's just a fact. And on Wednesday night (Jan. 28), the mysterious pop star proved that once again with a performance of "Iko Iko" on The Tonight Show.

Sia performed the New Orleans classic alongside Jimmy Fallon, The Roots and Natalie Portman. In true Sia style, all of the performers donned black and white blunt-bang wigs (like those seen on her new album cover) and wore monochromatic leotards.

To accompany the vocals of this campfire favorite track, Fallon, Portman and The Roots accompanied SIa on a variety of eclectic instruments, including a deck of cards, maracas, spoons, wood blocks, conga drums and cups.

In the middle of all of this, of course, is Sia. Wearing a wig that's bigger and grander than anyone else's with a big white bow in the center and sporting cherry red lips, Sia belts out "Iko Iko" louder than anyone else and adds in a series of runs and inflections in the way that really only she can. At the end, she lets out a note so loud and proud that Portman can be seen staring in amazement on her right.

Sia didn't just stop by The Tonight Show to perform an old classic song that isn't hers. She also performed her latest single "Cheap Thrills" off her new album This Is Acting.

This Is Acting, which is due to be released on Friday (Jan. 29), features a variety of songs Sia originally wrote for other singers, including "Alive," "Reaper" and "Bird Set Free."

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