Lena Dunham Does the Sia "Chandelier" Dance for Seth Meyers

Sia Performance: "Chandelier" Feat. Lena Dunham - Late Night with Seth Meyers

How does Sia top her unique performance on The Ellen Show, where she had dancer Maddie Ziegler recreate her amazing "Chandelier" video routine? The answer involves Lena Durham.

I wonder if Greta Gerwig wasn't available...