Janney's Mom co-star Anna Faris, The Big Bang Theory's Kunal Nayyar and Young Sheldon's Iain Armitage also appeared on Corden's Carpool Karaoke primetime special. ALSO: Melissa McCarthy dropped by Christina Aguilera's "Carpool Karaoke" ride.
TOPICS: The Late Late Show with James Corden, CBS, Allison Janney, Christina Aguilera, Melissa McCarthy, Carpool Karaoke, Late Night