Sia Teams With Natalie Portman And The Roots For “Iko Iko” Cover

Sia stopped by The Tonight Show this week to promote This Is Acting, which hits shelves tomorrow. She performed the album track "Cheap Thrills" and teamed up with the Roots, Jimmy Fallon, and Natalie Portman—all of whom wore the bi-colored wigs that Sia is using to promote her project—on the old New Orleans tune "Iko Iko," which became a hit in the mid '60s for the Dixie Cups.

Here's why everyone wants to sound like Sia.