Natalie Portman crashes Sia's performance with Jimmy Fallon and The Roots, everyone rocks epic Sia wigs!

Natalie Portman Reveals Her Wilder Past: 'I Got Drunk and No One Knew'
Natalie Portman Reveals Her Wilder Past: 'I Got Drunk and No One Knew'



Sia joined Jimmy Fallon on The Tonight Show on Wednesday for a wonderfully trippy performance, with a little help from Natalie Portman, The Roots and a bunch of black-and-blond Sia wigs.

The eclectic group of performers rocked an even more eclectic array of instruments for the lively rendition of the classic, oft-covered song "Iko Iko," and they even found a giant domino to use as a chair! But, really, we cannot get over the wigs.


href="http://www.etonline.com/news/176883_adele_jimmy_fallon_and_the_roots_perform_hello_with_classroom_instruments_and_it_flawless/" target="_blank">WATCH: Adele, Jimmy Fallon and The Roots Perform 'Hello' With Classroom Instruments and It's Flawless

It's just the most fun musical number you're going to see this week. Also, it just went to show you that no matter what hair style or outfit Portman wears, she always looks absolutely flawless.

Later in the episode Sia brought the house down with a performance of her song "Cheap Thrills" off her upcoming album This Is Acting, which comes out on Friday.

The Tonight Show Starring Jimmy Fallon airs weeknights at 11:30 p.m. ET/PT on NBC.

WATCH: Kristen Wiig's Crazy 'Chandelier' Dancing Steals the Show

Kristen Wiig's Crazy 'Chandelier' Modern Dancing Steals the Show at Grammys
Kristen Wiig's Crazy 'Chandelier' Modern Dancing Steals the Show at Grammys

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