EP1 - Justin Timberlake in Central Park {Season Premiere} EP2 - Beyonce in Central Park EP3 - Kevin Federline EP4 - Brad Garrett/Patrice Oneal EP5 - Andre Agassi/Kim Basinger EP6 - Jessica Simpson/Ron Livingston/Storm Large EP7 - Hugh Laurie/Tommy Lee EP8 - Orlando Bloom/Biance Ryan/Chi-Lan Lieu EP9 - Zach Braff/Outkast EP10 - The Rock/John Mayer EP11 - Julia Louis-Dreyfus/Bradley Whitford EP12 - Sir Elton John/Rainn Wilson EP13 - Dixie Chicks/Diane Lane EP14 - Sandra Oh/Josh Blue EP15 - Eva Longoria/Simon Baker/Cole & LD Miller EP16 - Matthew Perry/Kenny Chesney EP17 - Lauren Graham/Letoya/Emmitt Smith EP18 - Sting/Robert Downey Jr. EP19 - Howie Mandel/Chris Brown EP20 - Ashton Kutcher/Ludacris EP21 - Sheryl Crow/Christina Applegate *Breast Cancer Awareness* EP22 - Ted Danson/Robin Thicke/Jon Heder EP23 - Evangeline Lilly/Jesse Metcalfe EP24 - John Stamos/Andy Roddick/Prince Lorenzo Borghese EP25 - Marcia Cross/Rod Stewart/Mike Holmes EP26 - Leah Remini/Barry Watson/Monica EP27 - Wanda Sykes/Justin Chambers EP28 - Tiger Woods/America Ferrera EP29 - Allison Janney/Emeril Lagasse/Chingy EP30 - Calista Flockhart/Def Leppard EP31 - Bob Newhart, Amber Tamblyn, hypnotist Paul McKenna EP33 - Heidi Klum / John Krasinski EP34 - Jeff Corwin, Faith Hill EP35 - Hugh Jackman / Sarah McLachlan EP36 - Kirsten Dunst/Judge Joe Brown EP37 - Tina Fey/Katharine Heigl/Corrinne Bailey Rae EP38 - Annette Benning/JoJo EP39 - Amanda Peet/Rick Smith Jr. EP40 - Jon Cryer/Aaron Neville/Sharon Karriem EP41 - Tyra Banks, Barry Manilow EP42 - Patricia Arquette, Criss Angel, "Ghost Hunters" Jason Hawes and Grant Wilson EP43 - Roseanne, Carrie Underwood EP44 - Salma Hayek, wearer of the world's tallest Mohawk Aaron Studham EP45 - Sandra Bullock EP46 - Charlie Sheen, Tony Little, Richard Simmons EP47 - Russell Crowe, Hilary Duff EP48 - Emma Thompson, John Legend, the Flying Ace All Stars EP49 - Dustin Hoffman, Diddy, Hugh Hefner, Holly Madison, Kendra Wilkinson EP50 - Janet Jackson, Brittany Murphy EP51 - Martha Stewart, Shemar Moore, Stuart Whitehurst EP52 - Will Ferrell, James Blunt EP53 - Robin Williams, John Legend EP54 - Felicity Huffman, Bianca Ryan, 8-year-old skateboarding twins Tristan and Nic Puehse EP55 - Greg Kinnear, Tori Spelling EP56 - Penelope Cruz, Emmitt Smith EP57 - Bill Clinton, Jay-Z EP58 - Denzel Washington, Nathan Lane EP60 - Matt Lauer, Meredith Vieira EP61 - Matthew Broderick, Fred Willard, The Legends EP62 - Cameron Diaz, Chris Daughtry EP63 - Ben Affleck, Lucy Liu, Nathan Godsey EP64 - Ashley Judd, Snoop Dogg EP65 - Minnie Driver, Bob Proctor, John Assaraf EP66 - Masi Oka, Ali Larter, Hayden Panettiere, Sendhil Ramamurthy, Chris Kattan, dance squad "Diamonds N' Ruff" EP67 - Taye Diggs, Ciara EP68 - Jack Hanna, fitness trainer Bob Harper, Damien Rice EP69 - Emilio Estevez, Mike Holmes EP70 - Mel Gibson, Jo Frost, Mary J. Blige EP71 - William Shatner, Vanessa Marcil EP72 - Edward Norton, Anne Hathaway, The Fray EP73 - Jessica Biel, Shawn and Marlon Wayans EP74 - Dakota Fanning, Adam Beach, Natalie Cole EP75 - Kellie Pickler, Al Gore EP76 - Courteney Cox, John Mayer EP77 - Samuel L. Jackson, Eric Mabius EP78 - Matthew Fox, Martina Navratilova EP79 - Rob Lowe, Nick Graham EP80 - Jerry O'Connell, fitness trainer Bob Harper EP81 - Wesley Autrey, Hilary Swank EP82 - Patrick Dempsey, Indigo Girls, 11-year-old lizard whisperer Lily Capehart EP83 - Nicollette Sheridan, Terri and Bindi Irwin EP84 - Jennifer Love Hewitt, restaurateurs the Scotto family EP85 - The cast of "Little Miss Sunshine" EP86 - Paula Abdul EP87 - T.R. Knight, K.T. Tunstall EP88 - Meredith Vieira, Omarion, personal trainer Bob Harper EP89 - Donald Trump, Milo Ventimiglia EP90 - Steve Harvey EP91 - Judge Judy Sheindlin EP92 - George Lopez EP93 - Julie Andrews EP94 - Wanda Sykes, Jeff Corwin, Ellen's birthday EP95 - David Arquette, Bob Harper, 8-year-old piano prodigy Marc Yu EP96 - D.L. Hughley EP97 - Barbara Walters, Serena Williams, Gym Class Heroes EP98 - Diane Keaton EP99 - Jennifer Lopez EP100 - David Spade EP101 - America Ferrera, Keane, David Frei EP102 - Christina Aguilera EP103 - Rebecca Romijn, Bob Harper EP104 - Gwen Stefani EP105 - Queen Latifah, Jennifer Hudson, Nelly Furtado EP106 - Peter O'Toole, Dominic Monaghan, Keith Barry EP107 - Drew Barrymore, Jason Lewis, Lionel Richie EP108 - Forest Whitaker, Billy Blanks Jr. EP109 - Ryan Phillippe, Bob Harper, Katharine McPhee EP110 - Jimmy Kimmel EP111 - John Legend, John Travolta, EP112 - Jon Abrahams, Augustana, Sandra Bullock, Kyle Collier, Alana Etheridge, Jacob Hays, Laura Marano, Spencer Martin, Julian McMahon EP113 - Gina Glocksen, Corinne Bailey Rae, Leah Remini EP114 - Homaru Cantu, Ice Cube, Tim McGraw EP115 - Pink, Kurt Russell EP116 - Jeff Foxworthy, Patty Griffin, Mark Schulman EP125 - Anthony Hopkins, Stevie Nicks EP155 - Lauren Graham, Phil Stacey, Chris Richardson, Bon Jovi EP159 - Ellen in the Park EP161 - Mike Holmes, Antonio Banderas, Curtis Stone EP164 - Enrique Iglesias, Valerie Bertinelli EP167 - Orlando Bloom, Jason Randal, Joss Stone EP168 - Lin Charlie, Chris Daughtry, Charlie Liu, Debra Messing EP169 - Maroon 5, Katherine Heigl EP170 - Ashley Judd, Travis EP171 - Cheryl Hines, Holly Hunter, Jordin Sparks