Sia's Carpool Karaoke Has the Best Singing

James Corden took pop singer Sia for a ride around Los Angeles on Tuesday's Late Late Show. This latest edition has possibly the best singing there's ever been in a Carpool Karaoke, because Sia has an incredible voice. No one sounds like her unless they're singing a song she wrote, and then they can't help it (as we see when Sia and Corden sing Rihanna's "Diamonds").

They also sing a bunch of Sia-voiced songs, including "Chandelier," "Elastic Heart" and David Guetta's "Titanium."

Justin Bieber joins James Corden for not quite Carpool Karaoke

In between songs, viewers learn a lot about the mysterious Sia, including why she covers her face, her belief in aliens and that she can balance a dozen eggs on her double-jointed hands.

Check it out: