On Wednesday's Tonight Show, Jimmy Fallon, Sia, Natalie Portman, and the Roots performed a version of the much-covered New Orleans classic "Iko Iko" for apparently no other reason than it's awesome.

Natalie Portman seems confused. Questlove shreds on the woodblock. And if you're wondering if Sia wears a wig that covers her face and a giant bow on top...of course she does. She sure can sing, though. Everyone wears wigs, one half white, one half black. The color scheme is based on dominos.

Why? Because!