Last night, Sia found herself covering the classic New Orleans tune "Iko Iko" with a star-studded backing cast that included Natalie Portman and The Roots -- in bi-colored wigs, no less.

Performed on The Tonight Show -- along with a little help from host Jimmy Fallon, of course -- Sia also managed to sneak in a performance of her addictive, reggaeton-inflected track "Cheap Thrills" from This Is Acting, which in case you didn't remember, is finally out tomorrow. Watch her full performance of "Iko Iko" below and see her give the Dixie Cups a run for their money.

[h/t Fader]

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