James Corden’s “Carpool Karaoke” has become one of the most beloved late-night gimmicks over the past couple months. It’s right up there with Fallon’s lip-synching, which is saying something. Last night, he invited Sia to join him in the passenger seat, and to answer your question, yes, she wore her wig. And to answer your second question, no, there was no 10-year-old girl dancing in the back seat (as far as we can tell). Watch the video above.