Celebrity Wheel of Fortune

Amanda Seales, Snoop Dogg and Mark Duplass

Tiki Barber, Lauren Ash and Jim Jefferies

Kristen Schaal, Kevin McKidd and Ron Funches

Nikki Glaser, Tig Notaro and Thomas Lennon

Phil Rosenthal, Carla Hall, and Jet Tila

Francia Raisa, Joel Madden, and Jenifer Lewis

Kate Flannery, Steve Agee, and Austin Creed

Jaime Camil, Michael Rapaport and June Diane Raphael

Paul Scheer, Luenell and Mary Lynn Rajskub

RuPaul, Gayle King and Julie Bowen

Sasheer Zamata, Jack Black and Kal Penn

London Hughes, Fortune Feimster and Bobby Berk

Janelle James, Sheryl Lee Ralph and Chris Perfetti

Vanna White, Ken Jennings and Mayim Bialik

Contestants go head-to-head for charity in the Ultimate Host Night, with Vanna White calling letters instead of revealing them (for St. Jude Children's Research Hospital) against "Jeopardy!" hosts Ken Jennings (for the Equal Justice Initiative) and Mayim Bialik (for the Mental Wealth Alliance).