James Cordens Carpool Karaokes are coming hard and fast now.
On the latest, theLate Late Showhost drove singer Sia around L.A. for a musical trip through her discography.
After singing Chandelier together, Corden asked the singer why she wears such costumes.

Credit: CBS
I was a singer for 10 or 11 years to mediocre success, Sia said.
I was an alcoholic and a drug addict.
I thought, What doesnt exist in pop music at the moment?
And it was mystery.
I was like, theres pictures on Instagram of everyone at the dentist.
Corden even donned his own Sia wig for their rendition of Alien.
Even more interestingly, Sia also revealed that she believes in aliens.
My blood ran cold.
Hes not just some guy on YouTube.
Thats all I ask from aliens.
Watch the full clip below.