Jimmy, Sia and Natalie join the Roots for a special performance of the classic song "Iko Iko." Sia’s hugely anticipated seventh album, This is Acting, is about to arrive. So, naturally, she dropped by the studios of Jimmy Fallon’s Tonight Show to remind a global audience of her gifts.

The troupe — all donning Sia wigs — clicked and clacked their way through the song using an array of drums, percussion instruments and left-field noise makers, including spoons, cups, a deck of cards and a cue ball and eight-ball.

Portman might've actually gone against the grain and dressed as the Black Swan, now that we're looking at it. She reportedly hasn't even seen "Star Wars: The Force Awakens" yet.

When Fallon talked with Portman about the song, he said he hadn’t even thought about whether the words meant anything, He told Portman she was like a “human Wikipedia,” pointing to her Harvard education.

“I didn’t research it, I was just looking for the lyrics,” Portman said. “God, you go to Harvard, everyone gives you a hard time for the rest of your life.”

Tags: Jimmy Fallon sia Natalie Portman The Roots The Tonight Show Starring Jimmy Fallon "Iko Iko"