Host Louis C.K.; Rihanna performs.

Reese Witherspoon hosts with musical guest Florence + the Machine.

Host Scarlett Johansson; Performances by Wiz Khalifa, ft. Charlie Puth

Taraji P. Henson hosts and Mumford & Sons perform.

Michael Keaton hosts and Carly Rae Jepsen performs.

Dwayne Johnson hosts with musical guest George Ezra.

Dakota Johnson hosts with musical guest Alabama Shakes.

J.K. Simmons hosts with musical guest D'Angelo.

Host Amy Adams; One Direction Performs.

Get in the holiday spirit with a collection of the best Christmas sketches in SNL history.

Get in the holiday spirit with some of SNL's most memorable Thanksgiving sketches.

Woody Harrelson hosts with musical guest Kendrick Lamar.

Chris Rock hosts with musical guest Prince.

Jim Carrey hosts with musical guest Iggy Azalea.

Host Bill Hader; Hozier performs.

Sarah Silverman hosts with musical guest Maroon 5.

Chris Pratt hosts with musical guest Ariana Grande.