Scooby-Doo and Guess Who featuring Sia | Monster Sia, tunnels, and everyone in their pajamas? Always expect the unexpected with Sia... Help solve this week's mystery with Sia on Boomerang!... | By
![GEDEON | STREAM SIA 🎶 on Twitter: "„Now You Sia, Now You Don't“ is the name of the episode of Scooby Doo & Guess Who? ft. @Sia which is available now to GEDEON | STREAM SIA 🎶 on Twitter: "„Now You Sia, Now You Don't“ is the name of the episode of Scooby Doo & Guess Who? ft. @Sia which is available now to](https://pbs.twimg.com/media/EDu08BJXoAc0kcV.jpg)
GEDEON | STREAM SIA 🎶 on Twitter: "„Now You Sia, Now You Don't“ is the name of the episode of Scooby Doo & Guess Who? ft. @Sia which is available now to
![Sia Stars on 'Scooby-Doo & Guess Who?' – Watch Now! | Scooby-Doo, Sia | Just Jared: Entertainment News and Celebrity Photos Sia Stars on 'Scooby-Doo & Guess Who?' – Watch Now! | Scooby-Doo, Sia | Just Jared: Entertainment News and Celebrity Photos](https://cdn.justjared.com/wp-content/uploads/headlines/2019/09/sia-scooby.jpg)