Jonah Hill (Hail, Caesar! (2016)); Megyn Kelly (The Kelly File (2013)). Also: Wiz Khalifa performs with The Roots. ...

Jonah Hill (Hail, Caesar! (2016)); Megyn Kelly (The Kelly File (2013)). Also: Wiz Khalifa performs with The Roots. ...

'Josh Brolin promotes Hail, Caesar. Jimmy shaves Josh's mustache he grew for his next film role._); Kate McKinnon (Saturday Night Live (1975)). Also: Billy Ocean performs ...

'Josh Brolin promotes Hail, Caesar. Jimmy shaves Josh's mustache he grew for his next film role._); Kate McKinnon (Saturday Night Live (1975)). Also: Billy Ocean performs ...

Mark Ruffalo (Spotlight (2015)); Kendrick Lamar is interviewed and performs. ...

Mark Ruffalo (Spotlight (2015)); Kendrick Lamar is interviewed and performs. ...

Bruce Springsteen (boxed set The Ties That Bind: The River Collection); Jeffrey Tambor (Transparent (2014)). Also: Chris Stapleton performs. ...

Bruce Springsteen (boxed set The Ties That Bind: The River Collection); Jeffrey Tambor (Transparent (2014)). Also: Chris Stapleton performs. ...

Will Smith (Concussion (2015)); Kirsten Dunst (Fargo (2014)). Also: Calvin Harris performs with Disciples and Ina Wroldsen. ...

Will Smith (Concussion (2015)); Kirsten Dunst (Fargo (2014)). Also: Calvin Harris performs with Disciples and Ina Wroldsen. ...

Mindy Kaling (book Why Not Me?, The Mindy Project (2012)); Daisy Ridley (Star Wars: The Force Awakens (2015)). Also: Gwen Stefani performs with The Roots. ...

Mindy Kaling (book Why Not Me?, The Mindy Project (2012)); Daisy Ridley (Star Wars: The Force Awakens (2015)). Also: Gwen Stefani performs with The Roots. ...

Elizabeth Banks (The Hunger Games: Mockingjay - Part 2 (2015)); Jon Glaser (Neon Joe, Werewolf Hunter (2015)). Also: Tim McGraw performs. ...

Elizabeth Banks (The Hunger Games: Mockingjay - Part 2 (2015)); Jon Glaser (Neon Joe, Werewolf Hunter (2015)). Also: Tim McGraw performs. ...

Christoph Waltz (Spectre (2015)); Lin-Manuel Miranda (Broadway musical Hamilton). Also: Meghan Trainor performs. ...

Christoph Waltz (Spectre (2015)); Lin-Manuel Miranda (Broadway musical Hamilton). Also: Meghan Trainor performs. ...

Rob Lowe (The Grinder (2015)); Kat Dennings and Beth Behrs (2 Broke Girls (2011)). Also: Hozier performs. ...

Rob Lowe (The Grinder (2015)); Kat Dennings and Beth Behrs (2 Broke Girls (2011)). Also: Hozier performs. ...

Musician-actor Jared Leto; Amy Brenneman (The Leftovers (2014)). Also: Thirty Seconds to Mars performs; Tom Bailey sits in with The Roots. ...

Musician-actor Jared Leto; Amy Brenneman (The Leftovers (2014)). Also: Thirty Seconds to Mars performs; Tom Bailey sits in with The Roots. ...

Drew Barrymore; Giovanni Risibi. Also: Elbow perform. ...

Drew Barrymore; Giovanni Risibi. Also: Elbow perform. ...

Seth Rogen; Matt Bomer. Also: Coldplay perform. ...

Seth Rogen; Matt Bomer. Also: Coldplay perform. ...

Andrew Garfield; Mary Lynn Rajskub. Also: Chvrches perform. ...

Andrew Garfield; Mary Lynn Rajskub. Also: Chvrches perform. ...

Dr. Phil McGraw; James Van Der Beek. Also: Courtney Barnett performs; Steven Tyler and Joe Perry sit in with The Roots. ...

Dr. Phil McGraw; James Van Der Beek. Also: Courtney Barnett performs; Steven Tyler and Joe Perry sit in with The Roots. ...

Nicolas Cage; Emily VanCamp. Also: KISS perform. ...

Nicolas Cage; Emily VanCamp. Also: KISS perform. ...

Daniel Radcliffe wins when he plays Sticky Balls against Jimmy. ...

Daniel Radcliffe wins when he plays Sticky Balls against Jimmy. ...