Gone girl? Sia is hiding behind the BIGGEST wig we've ever seen

Sia's whole hide-and-seek shtick has reached new heights, ladies and gentleman.

This is her on the Grammys red carpet with dancer/muse Maddie Ziegler.

Honestly, have you ever seen a wig bigger than that?! At least she'll have something fluffy to sleep on if the show gets boring.

Let's take a closer look...