2x4 - Lena Dunham, J.K. Simmons, Ghostface Killah with the Revelations featuring AZ and Kool G Rap

January 8, 2015

Actress Lena Dunham; actor J.K. Simmons; rapper Ghostface Killah performs with special music guests rapper AZ and Kool G Rap.

2x5 - Don Cheadle, Kate Bosworth

January 9, 2015

Actor Don Cheadle; actress Kate Bosworth; rapper LeCrae performs

2x6 - Charlie Day, Jeff Musial, Little River Band

January 12, 2015

Actor Charlie Day; animal expert Jeff Musial; Darius Rucker performs

2x7 - Chris Hemsworth, Sienna Miller, Joey Bada$

January 13, 2015

Actor Chris Hemsworth; actress Sienna Miller; hip-hop artist Joey Bada$ performs

2x8 - Gwyneth Paltrow, Josh Gad, Panda Bear

January 14, 2015

Actress Gwyneth Paltrow; actor Josh Gad; Panda Bear performs

2x9 - Kevin Hart, Jay Baruchel, Meghan Trainor

January 15, 2015

Actor Kevin Hart; actor Jay Baruchel; singer-songwriter Meghan Trainor.

2x10 - Brian Williams, Victoria Justice, Joshua Topolsky

January 6, 2015

Journalist Brian Williams; actress Victoria Justice; technology journalist Joshua Topolsky.

2x11 - Jennifer Lopez, Anthony Mackie, Iliza Shlesinger

January 19, 2015

Actress Jennifer Lopez; actor Anthony Mackie; comic Iliza Shlesinger.

2x12 - Jude Law, Keri Russell, Fall Out Boy

January 20, 2015

Actor Jude Law; actress Keri Russell; Fall Out Boy performs.

2x13 - Jennifer Aniston, Bill Gates, Mario Batali

January 21, 2015

Actress Jennifer Aniston; business magnate Bill Gates; chef Mario Batali.

2x14 - Blake Shelton, Bob Costas, Mötley Crüe

January 22, 2015

Musician Blake Shelton; journalist Bob Costas; Mötley Crue performs.

2x15 - Ryan Seacrest, Maddie & Tae

January 23, 2015

TV host Ryan Seacrest; actress Taraji P. Henson; Maddie & Tae perform.

2x16 - Will Ferrell, Kevin Hart, Ariana Grande

February 1, 2015

Post Super Bowl live episode

2x17 - Michael Keaton, Gwen Stefani

February 2, 2015

Actor Michael Keaton; musician Gwen Stefani.

2x18 - Ellen DeGeneres, Neil Young, Doc Severinsen

February 3, 2015

Talk-show host Ellen DeGeneres; Neil Young performs; Doc Severinsen sits in with The Roots.

2x19 - Vin Diesel, Carl Reiner

February 4, 2015

Actor Vin Diesel; actor Carl Reiner; professional basketball player Kobe Bryant; Iggy Azalea and Jennifer Hudson perform.

2x20 - Will Smith, Rosamund Pike, Jack White

February 5, 2015

Actor Will Smith; actress Rosamund Pike; Jack White performs.

2x21 - Jamie Dornan, Hannah Davis, Sheppard

February 9, 2015

Actor Jamie Dornan; Sports Illustrated Swimsuit cover model Hannah Davis; Sheppard performs.

2x22 - Dakota Johnson, Anthony Anderson, Mark Ronson

February 10, 2015

Actress Dakota Johnson; actor Anthony Anderson; Mark Ronson performs.

2x23 - Hugh Grant, Charles Barkley, Kyle Kinane

February 11, 2015

Actor Hugh Grant; sports analyst Charles Barkley; comic Kyle Kinane.

2x24 - Colin Firth, Jack McBrayer, Triumph the Insult Comic Dog, the Weekend

February 12, 2015

Actor Colin Firth; actor Jack McBrayer; Triumph, the Insult Comic Dog; The Weeknd performs.

2x25 - Samuel L. Jackson, Norman Reedus, Jessie J

February 13, 2015

Actor Samuel L. Jackson; actor Norman Reedus; Jessie J. performs with The Roots.

2x26 - Edward Norton, Craig Robinson, Imagine Dragons

February 16, 2015

Actor Edward Norton; Craig Robinson; Imagine Dragons performs

2x27 - Taylor Swift, John Oliver, Imagine Dragons

February 17, 2015

Singer-songwriter Taylor Swift; TV host John Oliver; Imagine Dragons perform.

2x28 - Sigourney Weaver, Andy Cohen, Ella Henderson

February 18, 2015

Actress Sigourney Weaver; TV host Andy Cohen; Ella Henderson performs.

2x29 - Martin Short, Ruth Wilson

February 19, 2015

Actor Martin Short; actress Ruth Wilson; Walk the Moon performs.

2x30 - Kevin Bacon, Amy Sedaris, Nick Jonas

February 20, 2015

Actor Kevin Bacon; actress Amy Sedaris; Nick Jonas performs.

2x31 - Christina Aguilera, Jeff Probst, Kid Rock

February 23, 2015

Singer Christina Aguilera; TV host Jeff Probst; Kid Rock performs.

2x32 - Josh Duhamel, Gabrielle Union, Charlie Wilson

February 24, 2015

Actor Josh Duhamel; actress Gabrielle Union; Charlie Wilson performs.

2x33 - Ice-T, Andrew Rannells, Lupe Fiasco

February 25, 2015

Actor Ice-T; actor Andrew Rannells; Lupe Fiasco performs with The Roots.

2x34 - James Spader, Margot Robbie, Tobias Jesso Jr.

February 26, 2015

Actor James Spader; actress Margot Robbie; musician Tobias Jesso Jr performs

2x35 - Josh Hutcherson, Abbi Jacobson & Ilana Glazer, Michael Schlow

February 27, 2015

Actor Josh Hutcherson; actresses Abbi Jacobson and Ilana Glazer; chef Michael Schlow.

2x36 - Ryan Reynolds, Terrence Howard, Kelly Clarkson

March 2, 2015

Actor Ryan Reynolds; actor Terrence Howard; Kelly Clarkson performs.

2x37 - Judi Dench, Ansel Elgort, GZA, Tom Morello

March 3, 2015

Actress Judi Dench; actor Ansel Elgort; Gza and Tom Morello perform with The Roots.

2x38 - Danny DeVito, Zoe Kravitz

March 4, 2015

Actor Danny DeVito; actress Zoe Kravitz; comic Artie Lange.

2x39 - Hugh Jackman, Tiffani Thiessen, Hozier

March 5, 2015

Actor Hugh Jackman; actress Tiffani Thiessen; Hozier performs.

2x40 - Jim Parsons, Miles Teller, Wiz Khalifa

March 16, 2015

Actor Jim Parsons; actor Miles Teller; Wiz Khalifa performs.

2x41 - Jennifer Garner. Eugene Levy, Modest Mouse

March 17, 2015

Actress Jennifer Garner; actor Eugene Levy; Modest Mouse performs.

2x42 - Will Ferrell, Chelsea Peretti, Boots

March 18, 2015

Actor Will Ferrell; actress Chelsea Peretti; Boots performs.

2x43 - Ben Stiller, Tim Gunn, Rixton

March 19, 2015

Actor Ben Stiller; fashion consultant Tim Gunn; Rixton performs.

2x44 - Jeremy Piven, Ariana Grande

March 20, 2015

Actor Jeremy Piven; singer Ariana Grande; technology journalist Joshua Topolsky; Andy Summers performs with The Roots.

2x45 - January Jones, Bubba Watson, Brandon Flowers

March 23, 2015

Actress January Jones; professional golfer Bubba Watson; Brandon Flowers performs

2x46 - Elizabeth Banks, Ronda Rousey, Little Big Town

March 24, 2015

Actress Elizabeth Banks; mixed martial artist Ronda Rousey; Little Big Town performs.

2x47 - Mitt Romney, Grace Helbig, G-Unit

March 25, 2015

Former GOP presidential candidate Mitt Romney; actress Grace Helbig; G Unit performs with The Roots.

2x48 - Alan Cumming, Carey Mulligan, Ludacris

March 26, 2015

Actor Alan Cumming; actress Carey Mulligan; Ludacris performs with The Roots.

2x49 - Will Forte, Adam Horovitz, Jeremy Wade

March 27, 2015

Actor Will Forte; musician Adam Horovitz; TV personality Jeremy Wade.

2x50 - Helen Mirren, Oscar Isaac, Wale

March 30, 2015

Actress Helen Mirren; actor Oscar Isaac; Wale performs with The Roots.

2x51 - Ethan Hawke, Willie & Korie Robertson, Alt-J

March 31, 2015

Actor Ethan Hawke; TV personalities Willie and Korie Robertson; Alt-J performs.

2x52 - Pharrell, Roma Downey, Mark Burnett, Milky Chance

April 1, 2015

Musician Pharrell; TV producers Roma Downey and Mark Burnett; Milky Chance performs.

2x53 - First lady Michelle Obama, Matthew Morrison, Smashing Pumpkins

April 2, 2015

First lady Michelle Obama; actor Matthew Morrison; Smashing Pumpkins perform.

2x55 - Michael Douglas, Kat Dennings, St. Vincent

April 6, 2015

Actor Michael Douglas; actress Kat Dennings; St. Vincent performs.

2x56 - Louis C.K., Sophia Bush, Who Is Fancy

April 7, 2015

Actor Louis C.K.; actress Sophia Bush; Who Is Fancy performs.

2x57 - Julia Louis-Dreyfus, Scott Eastwood, Flo Rida

April 8, 2015

Actress Julia Louis-Dreyfus; actor Scott Eastwood; Flo Rida performs with The Roots.

2x58 - Madonna, Nikolaj Coster-Waldau

April 9, 2015

Actor Nikolaj Coster-Waldau; Madonna performs.

2x59 - Kevin James, Vanessa Hudgens, Dan White

April 10, 2015

Actor Kevin James; actress Vanessa Hudgens; illusionist Dan White.

2x60 - LL Cool J, Rose Byrne, Big Sean

April 20, 2015

Actor/musician LL Cool J; actress Rose Byrne; rapper Big Sean.

2x61 - Blake Lively, Brian Grazer, Nate Bargatze, 'Weird Al' Yankovic

April 21, 2015

Actress Blake Lively; producer Brian Grazer; comic Nate Bargatze; Weird Al Yankovic performs with The Roots.

2x62 - Russell Crowe, Chris Christie, Kenny Chesney

April 22, 2015

Actor Russell Crowe; NJ governor Chris Christie; musician Kenny Chesney performs.

2x63 - Chris Evans, Monty Python, LunchMoney Lewis

April 23, 2015

Actor Chris Evans; comedy troupe Monty Python; LunchMoney Lewis performs with The Roots.

2x64 - Chris Pratt, Elizabeth Olsen

April 24, 2015

Actor Chris Pratt; actress Elizabeth Olsen; "Fallonventions."

2x65 - Robert Downey Jr., Fran Lebowitz, Zac Brown Band

April 27, 2015

Actor Robert Downey Jr.; author Fran Lebowitz; Zac Brown Band performs.

2x66 - Jeremy Renner, Edie Falco, Tori Kelly

April 2, 2015

Actor Jeremy Renner; actress; Edie Falco; Tori Kelly performs

2x67 - Kristen Wiig, Thomas Middleditch, Josh Groban

April 29, 2015

Actress Kristen Wiig; actor Thomas Middleditch; Josh Groban performs

2x68 - Scarlett Johansson, David Steinberg, Blur

April 30, 2015

Actress Scarlett Johansson; comic David Steinberg; Blur performs.

2x69 - Helen Hunt, Jesse Eisenberg, My Morning Jacket

May 1, 2015

Actress Helen Hunt; actor Jesse Eisenberg; My Morning Jacket performs.

2x70 - Jack Black, Melissa Rivers, Jeff Garlin

May 4, 2015

Actor Jack Black; TV personality Melissa Rivers; comic Jeff Garlin.

2x71 - Sofia Vergara, James Marsden, Fetty Wap

May 5, 2015

Actress Sofia Vergara; actor James Marsden; Fetty Wap performs.

2x72 - Kerry Washington, Jesse Tyler Ferguson, Noel Gallagher

May 6, 2015

Actress Kerry Washington; actor Jesse Tyler Ferguson; Noel Gallagher performs.

2x73 - Jane Fonda, Sean Diddy Combs, the Vaccines, Jeff Bradshaw

May 7, 2015

Actress Jane Fonda; rapper Sean "Diddy" Combs; The Vaccines perform; Jeff Bradshaw performs with The Roots.

2x74 - U2

May 8, 2015

U2 performs

2x75 - Charlize Theron, Tom Brokaw, Death Cab For Cutie

May 11, 2015

Actress Charlize Theron; journalist Tom Brokaw; Death Cab for Cutie performs.

2x76 - Anna Kendrick, Terry Crews, Nate Ruess, Unlocking the Truth

May 12, 2015

Actress Anna Kendrick; actor Terry Crews; Nate Ruess performs with The Roots; Unlocking the Truth performs with The Roots.

2x77 - Rebel Wilson, Rosie Huntington-Whiteley, Faith No More

May 13, 2015

Actress Rebel Wilson; actress Rosie Huntington-Whiteley; Faith No More performs.

2x78 - Bill O'Reilly, Snoop Dogg

May 14, 2015

TV show host Bill O'Reilly; Snoop Dogg performs with The Roots.

2x79 - Queen Latifah, Sam Rockwell, a performance by the Broadway cast of Something Rotten!

May 15, 2015

Actress Queen Latifah; actor Sam Rockwell; a performance from "Something Rotten!"

2x80 - Hugh Jackman, Nick Offerman, Janelle Monae

May 18, 2015

Actor Hugh Jackman; actor Nick Offerman; Janelle Monáe performs with The Roots.

2x81 - Jamie Foxx, Carla Gugino, Jamie Foxx featuring Kid Ink

May 19, 2015

Actor Jamie Foxx; actress Carla Gugino; Jamie Foxx performs with Kid Ink.

2x82 - David Duchovny, Jeff Foxworthy, Pitbull, Kevin Eubanks

May 20, 2015

Actor David Duchovny; comic Jeff Foxworthy; Pitbull performs; Kevin Eubanks performs with The Roots.

2x83 - Dwayne Johnson, Meghan Trainor, John Legend

May 21, 2015

Actor Dwayne Johnson; Meghan Trainor performs with John Legend.

2x84 - Sting, Kevin Connolly, Kevin Delaney

May 22, 2015

Musician Sting; actor Kevin Connolly; scientist Kevin Delaney.

2x85 - Melissa McCarthy, Ed Sheeran, Terence Blanchard

June 1, 2015

Actress Melissa McCarthy; Ed Sheeran performs; Terence Blanchard performs with The Roots.

2x86 - Jude Law, Bryce Dallas Howard, Florence & the Machine

June 2, 2015

Actor Jude Law; actress Bryce Dallas Howard; Florence and the Machine performs.

2x87 - Jason Statham, Adrian Grenier, Elayne Boosler

June 3, 2015

Actor Jason Statham; actor Adrian Grenier; comic Elayne Boosler.

2x88 - John Cusack, Chita Rivera, Ricky Martin

June 4, 2015

Actor John Cusack; actress Chita Rivera; Ricky Martin performs.

2x89 - Amanda Seyfried, Marlon Wayans, Jason Derulo

June 5, 2015

Actress Amanda Seyfried; actor Marlon Wayans; Jason Derulo performs with The Roots.

2x90 - Larry David, Jason Alexander, Natasha Leggero, Alabama Shakes

June 8, 2015

Actors Larry David and Jason Alexander; actress Natasha Leggero; Alabama Shakes perform.

2x91 - Denis Leary, Molly Shannon, Kacey Musgraves

June 9, 2015

Actor Denis Leary; actress Molly Shannon; Kacey Musgraves performs.

2x92 - Whoopi Goldberg, Christian Slater, Of Monsters and Men

June 10, 2015

TV host Whoopi Goldberg; actor Christian Slater; Of Monsters and Men perform.

2x93 - David Spade, Jennette McCurdy, A Rocky

June 11, 2015

Actor David Spade; actress Jennette McCurdy; A Rocky performs with The Roots.

2x94 - Lena Dunham, Colin Quinn

June 12, 2015

Actress Lena Dunham; comic Colin Quinn.

2x95 - Aziz Ansari, Taylor Schilling, Adam Lambert

June 15, 2015

Actor Aziz Ansari; actress Taylor Schilling; Adam Lambert performs; Larry Campbell performs with The Roots.

2x96 - Billy Crystal, Jeb Bush, Courtney Barnett

June 16, 2015

Actor Billy Crystal; Courtney Barnett performs.

2x97 - Mark Ruffalo, Alan Rickman, James Taylor

June 17, 2015

Actor Mark Ruffalo; actor Alan Rickman; James Taylor performs.

2x98 - Colin Farrell, Jason Schwartzman, Elmo

June 18, 2015

Actor Colin Farrell; actor Jason Schwartzman; Elmo.

2x99 - Vince Vaughn, Jim Gaffigan, Ryn Weaver

June 19, 2015

Actor Vince Vaughn; comic Jim Gaffigan; Ryn Weaver performs.

2x100 - Seth MacFarlane, Amber Heard, Leon Bridges

June 22, 2015

Actor Seth MacFarlane; actress Amber Heard; Leon Bridges performs.

2x101 - Channing Tatum, Mo Rocca, X Ambassadors

June 23, 2015

Actor Channing Tatum; actor Mo Rocca; X Ambassadors performs.

2x102 - Arnold Schwarzenegger, Mike Birbiglia, Major Lazer

June 24, 2015

2x103 - Mark Wahlberg, Chris Colfer, Morrissey

June 25, 2015

2x104 - Benicio Del Toro, Taylor Kitsch, Penn & Teller

June 26, 2015