Episode 1 - Christina Ricci, Mike 'The Situation' Sorrentino, Paul 'DJ Pauly D' DelVecchio, Vinny Guadagnino, Ronnie Ortiz-Magro, Mariachi El Bronx

Episode 2 - Kelsey Grammer, Octavia Spencer, Lloyd

Episode 3 - Tracy Morgan, Chris Paul, tUnE-yArDs

Episode 4 - Don Cheadle, David Cross, Boyz II Men

Episode 5 - Channing Tatum, Ben Flajnik, Uh Huh Her

Episode 6 - Randy Jackson, Dermot Mulroney, Will Hoge

Episode 7 - Woody Harrelson, Yvonne Strahovski, Rodney Atkins

Episode 8 - Meryl Streep, Stephen Merchant, Kina Grannis

Episode 9 - Katherine Heigl, Ne-Yo, Grouplove

Episode 10 - Will Arnett, Madeleine Stowe, Dana Gould

Episode 11 - Tom Arnold, Keke Palmer, Filter

Episode 12 - Terrence Howard, Thomas Horn, Safetysuit

Episode 13 - Kiefer Sutherland, Bear Grylls, Young the Giant

Episode 14 - Elizabeth Banks, Ben McKenzie, Mindless Behavior

Episode 15 - Cuba Gooding Jr., Sara Hyland, Big Freedia

Episode 16 - Andre Agassi, J.B. Smoove, Seal

Episode 17 - Kate Walsh, Marc Maron, Fishbone

Episode 18 - Martin Scorsese, Kenneth Branagh, Angels and Airwaves

Episode 19 - John Krasinski, Eloise Mumford, Gotye

Director Martin Scorsese ("Hugo"); Kenneth Branagh ("My Week With Marilyn"). Also: Angels & Airwaves perform.

Episode 20 - Gary Oldman, Tim Heidecker & Eric Wareheim, Korn

Episode 21 - Michelle Williams, Angela 'Big Ang' Raiola, Pitbull

Episode 22 - Antonio Banderas, Damon Wayans Jr., 50 Cent

Episode 23 - Nathan Fillion, Josh Hutcherson, Far East Movement

Episode 24 - Courteney Cox, Mario Manningham & Ahmad Bradshaw, Tony Bennett

Episode 25 - Jeff Goldblum, David Alan Grier, Lana Del Rey

Episode 26 - John Goodman, Kevin Nealon, Robin Thicke

Episode 27 - Sean 'Diddy' Combs, 'Science Bob' Pflugfelder, Miley Cyrus

Episode 28 - Chris Pine, Khloe Kardashian Odom, Puscifer

Episode 29 - Eric Stonestreet, Kate Upton, Jake Owen

Episode 30 - Jessica Alba, Rep. Barney Frank, Nathan Myhrvold, Tower of Power

Episode 31 - Joel McHale, Justin Theroux, Die Antwoord

Episode 32 - After the Oscars Special

Oprah Winfrey; Musical Guest Coldplay

Episode 33 - Steven Tyler, Harvey Weinstein, Melanie Fiona

Episode 34 - Maria Menounos; Mat Kearney

“Dancing with the Stars” contestant Maria Menounos; musical guest Mat Kearney.

Episode 35 - Ed Helms, Leslie Bibb, Wallpaper

Episode 36 - Joan Rivers, Nicki Minaj

Episode 37 - Dr. Phil McGraw; “The Bachelor” runner-up Lindzi Cox; Keane

Episode 38 - Will Ferrell; actress Ellie Kemper; Allen Stone

Actor/comedian Will Ferrell; actress Ellie Kemper; music from Allen Stone.

Episode 39 - Jonah Hill; Busy Philipps; The Crystal Method feat. Martha Reeves

Episode 40 - Channing Tatum; actor Genesis Rodriguez

Actor Channing Tatum; actress Genesis Rodriguez.

Episode 41 - Jessica Simpson; Gael García Bernal

Actress Jessica Simpson; actor Gael García Bernal.

Episode 42 - Kristen Bell; actor Ice Cube; KISS performs

Actress Kristen Bell; actor/musician Ice Cube; musical guests KISS.

Episode 43 - Don Rickles; Amanda de Cadenet; Dr. Teeth and the Electric Mayhem

Episode 44 - Kristin Chenoweth; racecar driver Jimmie Johnson; Neon Trees

Episode 45 - Zooey Deschanel; actor Steven Seagal; Shinedown

Actress Zooey Deschanel; actor Steven Seagal; musical guests Shinedown.

Episode 46 - Ashton Kutcher and Justin Bieber; All-American Rejects

Episode 47 - Adam Carolla; professional basketball player Kevin Durant; White Rabbits

Episode 48 - Carson Daly; actress Kristen Schaal

Episode 49 - Seann William Scott; actress Christa Miller; Eli Young Band

Episode 50 - Edie Falco; Amy Schumer

Episode 51 - Jason Biggs; Lionel Richie and Billy Currington

Episode 52 - Anthony Davis; actress Lena Headey; NeedToBreathe

Episode 53 - LL Cool J; actor James Van Der Beek; Josh Baze

Episode 54 - David Spade; Slash feat. Myles Kennedy

Episode 55 - Ashley Judd; director Bobcat Goldthwait; The Civil Wars

Episode 56 - Danny McBride; actress Dianna Agron; The Shins

Episode 57 - Zac Efron; actress Krysten Ritter; Noel Gallagher

Episode 58 - Mark Harmon; Dancing With the Stars castoff; Ashanti performs

Episode 59 - Jennifer Love Hewitt; Chef Georgia Pellegrini; Jason Mraz

Episode 60 - Gabourey Sidibe; Morgan Spurlock; Kasabian

Episode 61 - Julia Louis-Dreyfus; Andy Hoang & Erik Salgado; The Hives

Actress Julia Louis-Dreyfus; Scrabble champions Andy Hoang & Erik Salgado; musical guests The Hives.

Episode 62 - John Cusack; Vintage Trouble

Episode 63 - Sharon Osbourne; Max Greenfield; LP

Episode 64 - Emily Blunt; Dave Salmoni; Adam Lambert

Episode 65 - Vanessa Williams; Jonny Lee Miller; Andrew Bird

Episode 66 - David Arquette; Civil Twilight

Episode 67 - William H. Macy; Eva Green; Brad

Episode 68 - Scarlett Johansson; Roger Daltrey

Episode 69 - Kristen Stewart; Chloë Grace Moretz; B.o.B.

Episode 70 - Johnny Depp; Casey Wilson; Silversun Pickups

Episode 71 - Steve Harvey; Dev Patel; Glenn Frey

Episode 72 - Dr. Phil McGraw; Carrie Underwood

Episode 73 - Drew Carey; Rita Wilson

Episode 74 - Matthew Morrison; Beth Stern; Delta Spirit

Episode 75 - Kristin Bell; Dax Shepard; Jason Mantzoukas; The Cult

Episode 76 - Kathy Griffin; Emily Maynard; Gavin DeGraw

Episode 77 - Patricia Heaton; Nikolaj Coster-Waldau; Lisa Marie Presley

Episode 78 - Josh Brolin; Bethenny Frankel; Kimbra

Episode 79 - Charlize Theron; Manny Pacquiao; Graffiti6

Episode 80 - Christina Ricci; Chef Adam Perry; fun.

Episode 81 - Andy Samberg; Edward Sharpe and the Magnetic Zeros

Actor/comedian Andy Samberg; National Spelling Bee Champion Snigdha Nandipati; musical guests Edward Sharpe & The Magnetic Zeros.

Episode 82 - Kim Kardashian, Kourtney Kardashian and Khloe Kardashian Odom; Adam Carolla; K'Naan

Episode 83 - Edward Norton; Leighton Meester; Dead Sara

Episode 84 - Martin Short; Cee Lo Green; Goodie Mob

Episode 85 - Jada Pinkett Smith; Matt Kemp; The Temper Trap

Episode 86 - Sally Field; Kevin Love; Waka Flocka Flame

Episode 87 - Anderson Cooper; Scott Caan; Metric

Episode 88 - Katy Perry; Alex Pettyfer; The Offspring

Episode 89 - Louis C.K.; Zoe Kazan

Episode 90 - Matt LeBlanc; Selma Blair; Linkin Park

Episode 91 - Howie Mandel; Chris Bosh; Linkin Park

Episode 92 - Paul Reubens; Dreama Walker; Marina and the Diamonds

Episode 93 - Gary Oldman; Rob Riggle; The Dirty Heads

Episode 94 - Wanda Sykes; Joel Kinnaman; Serj Tankian

Episode 95 - Billy Crudup; Fred Willard; Grace Potter and the Nocturnals

Episode 96 - Bryan Cranston; Larry King; Zac Brown Band

Episode 97 - Russell Brand; Olivia Munn; Matisyahu

Episode 98 - Kate Beckinsale; Chris Harrison; Rubblebucket

Episode 99 - Charlie Sheen; Nicole 'Snooki' Polizzi; Huey Lewis & Joe Cocker

Episode 100 - Ben Stiller; Emily Maynard; The Head and the Heart

Episode 101 - Jeremy Renner; Aaron Paul; Nas

Episode 102 - Colin Farrell; Rosemarie DeWitt; Trey Songz

Episode 103 - Jessica Biel; Rick Ross

Episode 104 - David Duchovny; Jeff Ross; Alabama Shakes

Episode 105 - Joseph Gordon-Levitt; Rebel Wilson; Good Old War

Episode 106 - Thomas Haden Church; Rick Bayless; JJAMZ

Episode 107 - Jennifer Garner; Paul Scheer; The Fixx

Episode 108 - Tom Arnold; Ashley Greene; The Wood Brothers

Episode 109 - Gordon Ramsay; Jordin Sparks; Andy Grammer

Episode 110 - Robert Pattinson; Rick & Corey Harrison; Poliça

Episode 111 - Kyra Sedgwick; Nick Prueher & Joe Pickett; Josh Doyle

Episode 112 - Jamie Foxx; Cat Deeley; Imagine Dragons

Episode 113 - Bob Newhart; Kevin Hart; Miss Willie Brown

Episode 114 - Matt Stone & Trey Parker; Adam Scott; Everclear

Episode 115 - Lea Michele; Simon Bird; The Avett Brothers

Episode 116 - Dr. Phil McGraw; Dakota Johnson; Rita Ora

Episode 117 - Britney Spears & Simon Cowell; Slightly Stoopid

Episode 118 - Terry Bradshaw; Dave Matthews

Episode 119 - Matthew Perry; Josh Hamilton; Kreayshawn

Episode 120 - Richard Gere; Josh Radnor

Episode 121 - Julie Bowen; Nate Parker; The Afghan Whigs

Episode 122 - Julianna Margulies; Jessie Tyler Ferguson; The Killers

Episode 123 - Melanie Griffith; Kerry Washington; Alanis Morissette

Episode 124 - Keanu Reeves; Ginnifer Goodwin; Green Day

Episode 125 - Selena Gomez; Lenny Venito; Tony Bennett

Episode 126 - Zooey Deschanel; Maggie Grace; Electric Approach

Episode 127 - Ty Burrell; Chris Paul; Psy

Episode 128 - Amy Poehler; Alan Arkin; Garbage

Episode 129 - Zac Efron; Jack Black & Kyle Gass; Tenacious D

Zac Efron (The Paper Boy), Jack Black, Kyle Glass, Musical Guest Tenacious D

Episode 130 - Ben Affleck; Demi Lovato; Ben Howard

Ben Affleck (Argo), Demi Lovato (X Factor), Musical Guest Ben Howard

Episode 131 - Megan Mullally; Father John Misty

Megan Mullally (Smashed), Drew Lachey, Anna Trebunskaya, Helio Castroneves, Chelsie Hightower, Musical Guest Father John Misty

Episode 132 - Will Arnett; Chris Elliott; Dwight Yoakam

Will Arnett (Up All Night), Chris Elliot (The Guy Under the Sheets: The Unauthorized Autobiography), Musical Guest Dwight Yoakam

Episode 133 - Kevin James; Ezra Miller

Kevin James (Here Comes the Boom), Ezra Miller (The Perks of Being a Wallflower)

Episode 134 - Aziz Ansari; Alana “Honey Boo Boo” Thompson & June “Mama” Shannon; Josh Turner

Aziz Ansari (Parks and Recreation), Alana "Honey Boo Boo" Thompson and June "Mama" Shannon (Here Comes Honey Boo Boo), Musical Guest Josh Turner

Episode 135 - Don Rickles; Dancing with the Stars Castoff; Miguel

Don Rickles (Performing at the Taj Mahal in Atlantic City), Dancing with the Stars Castoff, Musical Guest Miguel

Episode 136 - Joel McHale; Joe Walsh

Joel McHale (Community), Joe Walsh, Musical Guest Joe Walsh

Episode 137 - Matthew Fox; Emily VanCamp; Paul Weller

Matthew Fox (Alex Cross), Emily VanCamp (Revenge), Musical Guest Paul Weller

Episode 138 - Russell Peters; Prince

Jerry O'Connell, Russell Peters, Musical Guest Prince

Episode 139 - Axl Rose; Ana Gasteyer; The Whigs

Axl Rose (The Guns and Roses Residency), Ana Gasteyer (Suburgatory), Musical Guest The Whigs

Episode 140 - Michelle Obama; Halle Berry; Ciara

First Lady Michelle Obama, Halle Berry (Cloud Atlas), Musical Guest Ciara

Episode 141 - Kelly Ripa; Alicia Keys

Kelly Ripa (Live with Kelly and Michael), Musical Guest Alicia Keys

Episode 142 - Howard Stern; Tracy Morgan; Sharon Jones and the Dap-Kings

Howard Stern, Tracy Morgan, Musical Guest Sharon Jones & the Dap-Kings

Episode 143 - David Letterman; Vampire Weekend

David Letterman ("Late Show with David Letterman"), Musical Guest Vampire Weekend.

Episode 144 - Jon Stewart & Stephen Colbert; The Avett Brothers with the Brooklyn Philharmonic

Jon Stewart ("The Daily Show") & Stephen Colbert ("The Colbert Report"), Musical Guest The Avett Brothers with the Brooklyn Philharmonic.

Episode 145 - Robert Pattinson; Chris Hardwick; Ben Folds Five

Robert Pattinson ("Twilight Saga: Breaking Dawn - Part 2"), Chris Hardwick ("Chris Hardwick: Mandroid"), Musical Guest Ben Folds Five.

Episode 146 - John Goodman; Hayden Panettiere; Machine Gun Kelly

John Goodman ("Flight"), Hayden Penettiere ("Nashville"), Music Guest Machine Gun Kelly.

Episode 147 - Kirstie Alley; Dave Salmoni; Tyler Bryant & The Shakedown

Kirstie Alley ("The Art of Men (I Prefer Mine Al Dente)"), Animal Trainer Dave Salmoni, Musical Guest Tyler Bryant & The Shakedown.

Episode 148 - Daniel Craig; Stephenie Meyer; Boys Like Girls

Daniel Craig ("Sky Fall"), Stephenie Meyer ("Twilight Saga: Breaking Dawn - Part 2"), Musical Guest Boys Like Girls.

Episode 149 - Jessica Lange; Adam Pally; Game feat. Tyga & Wiz Khalifa

Jessica Lange ("American Horry Story"), Adam Pally ("Happy Endings"), Musical Guest Game feat. Tyga & Wiz Khalifa.

Episode 150 - Christina Applegate; Youngblood Hawk

Christina Applegate ("Up All Night"), "Dancing with the Stars" Castoffs, Musical Guest Youngblood Hawk.

Episode 151 - Martin Short; Suraj Sharma; Ne-Yo

Martin Short, Suraj Sharma ("Life of Pi"), Musical Guest Ne-Yo.

Episode 152 - Mel Brooks; Jake Tapper; Jason Aldean

Mel Brooks, Jake Tapper ("The Outpost: An Untold Story of American Valor"), Musical Guest Jason Aldean.

Episode 153 - Eric Stonestreet; L.A. Reid; Aimee Mann & James Mercer

Eric Stonestreet ("Modern Family"), L.A. Reid ("X Factor"), Muiscal Guests Aimee Mann & James Mercer.

Episode 154 - Two Dancing with the Stars Castoffs; Andy Allo

Andy Garcia ("A Dark Truth"), "Dancing with the Stars" Castoffs, Musical Guest Andy Allo.

Episode 155 - Tim Allen; Manny Pacquiao; Flo Rida

Tim Allen ("Last Man Standing"), Manny Pacquiao, Musical Guest Flo Rida.

Episode 156 - Ryan Seacrest; Erin Andrews; Soundgarden

Ryan Seacrest ("Dick Clark's New Year's Rockin' Eve with Ryan Seacrest 2013"), Erin Andrews (FOX's College Football Pregame Show), Musical Guest Soundgarden.

Episode 157 - Reba McEntire; Mike Tyson; Youngblood Future

Reba McEntire ("Malibu Country"), Mike Tyson, Melissa Rycroft & Tony Dovolani ("Dancing with the Stars"), Musical Guest Future.

Episode 158 - Eric Bana; Damian Lewis; Wiz Khalifa

Eric Bana ("Dead Fall"), Damian Lewis ("Homeland"), Musical Guest Wiz Khalifa.

Episode 159 - Ted Danson; Emilia Clarke; Larry g(EE)

Ted Danson ("CSI: Crime Scene Investigation"), Emilia Clarke ("Game of Thrones"), Musical Guest Larry g(EE)

Episode 160 - Leslie Mann; Ted; Sarah Jaffe

Leslie Mann ("This Is 40"), Seth MacFarlane as Ted ("Ted"), Musical Guest Sarah Jaffe

Episode 161 - John Krasinski; Mike Birbiglia; Atlas Genius

John Krasinski ("Promised Land"), Mike Birbiglia ("Sleepwalk with Me"), Musical Guest Atlas Genius

Episode 162 - Zachary Knighton; Dan Deacon

TV host Carson Daly; actor Zachary Knighton ("Happy Endings"); musical guest Dan Deacon

Episode 163 - Hugh Jackman; Jenna Fischer; 2 Chainz

Hugh Jackman ("Les Misérables"), Jenna Fischer ("The Office"), Musical Guest 2 Chainz.

Episode 164 - Samuel L Jackson; Jersey Shore cast; Ed Sheeran

Samuel L. Jackson ("Django Unchained"); the cast of "Jersey Shore": Snooki, JWoww, Pauly D., Vinny, Sami, Ronnie, Mike and Deena; Musical Guest Ed Sheeran

Episode 165 - Eric Stonestreet; L.A. Reid; Aimee Mann and James Mercer

Episode 166 - Jessica Lange; Adam Pally; Game featuring Tyga