The supergroup of Sia, Natalie Portman, Jimmy Fallon and The Roots banded together to fulfill their destiny of covering a classic New Orleans Mardi Gras song together, while wearing Sia wigs. It is certainly the most random Fallon bit since he stuffed Hugh Jackman, Shaquille O'Neill and Alex Trebek into phone booths, or played the recorder with his nose. Unfortunately, Portman doesn't break it down with a rap in the middle, but she still rocks on the blocks.

Sources: The Tonight Show Starring Jimmy Fallon