Justin Timberlake in Central Park {Season Premiere}

45 min

Beyonce in Central Park

45 min

Kevin Federline

45 min

Brad Garrett/Patrice Oneal

45 min

Andre Agassi/Kim Basinger

45 min

Jessica Simpson/Ron Livingston/Storm Large

45 min

Hugh Laurie/Tommy Lee

45 min

Orlando Bloom/Biance Ryan/Chi-Lan Lieu

45 min

Zach Braff/Outkast

45 min

The Rock/John Mayer

45 min

Julia Louis-Dreyfus/Bradley Whitford

45 min

Sir Elton John/Rainn Wilson

45 min

Dixie Chicks/Diane Lane

45 min

Sandra Oh/Josh Blue

45 min

Eva Longoria/Simon Baker/Cole & LD Miller

45 min

Matthew Perry/Kenny Chesney

45 min

Lauren Graham/Letoya/Emmitt Smith

45 min

Sting/Robert Downey Jr.

45 min

Howie Mandel/Chris Brown

45 min

Ashton Kutcher/Ludacris

45 min

Sheryl Crow/Christina Applegate *Breast Cancer Awareness*

45 min

Ted Danson/Robin Thicke/Jon Heder

45 min

Evangeline Lilly/Jesse Metcalfe

45 min

John Stamos/Andy Roddick/Prince Lorenzo Borghese

45 min

Marcia Cross/Rod Stewart/Mike Holmes

45 min

Leah Remini/Barry Watson/Monica

45 min

Wanda Sykes/Justin Chambers

45 min

Tiger Woods/America Ferrera

45 min

Allison Janney/Emeril Lagasse/Chingy

45 min

Calista Flockhart/Def Leppard

45 min

Bob Newhart, Amber Tamblyn, hypnotist Paul McKenna

45 min

Heidi Klum / John Krasinski

45 min

Jeff Corwin, Faith Hill

45 min

Hugh Jackman / Sarah McLachlan

45 min

Kirsten Dunst/Judge Joe Brown

45 min

Tina Fey/Katharine Heigl/Corrinne Bailey Rae

45 min

Annette Benning/JoJo

45 min

Amanda Peet/Rick Smith Jr.

45 min

Jon Cryer/Aaron Neville/Sharon Karriem

45 min

Tyra Banks, Barry Manilow

45 min

Patricia Arquette, Criss Angel, "Ghost Hunters" Jason Hawes and Grant Wilson

45 min

Roseanne, Carrie Underwood

45 min

Salma Hayek, wearer of the world's tallest Mohawk Aaron Studham

45 min

Sandra Bullock

45 min

Charlie Sheen, Tony Little, Richard Simmons

45 min

Russell Crowe, Hilary Duff

45 min

Emma Thompson, John Legend, the Flying Ace All Stars

45 min

Dustin Hoffman, Diddy, Hugh Hefner, Holly Madison, Kendra Wilkinson

45 min

Janet Jackson, Brittany Murphy

45 min

Martha Stewart, Shemar Moore, Stuart Whitehurst

45 min

Will Ferrell, James Blunt

45 min

Robin Williams, John Legend

45 min

Felicity Huffman, Bianca Ryan, 8-year-old skateboarding twins Tristan and Nic Puehse

45 min

Greg Kinnear, Tori Spelling

45 min

Penelope Cruz, Emmitt Smith

45 min

Bill Clinton, Jay-Z

45 min

Denzel Washington, Nathan Lane

45 min

Matt Lauer, Meredith Vieira

45 min

Matthew Broderick, Fred Willard, The Legends

45 min

Cameron Diaz, Chris Daughtry

45 min

Ben Affleck, Lucy Liu, Nathan Godsey

45 min

Ashley Judd, Snoop Dogg

45 min

Minnie Driver, Bob Proctor, John Assaraf

45 min

Masi Oka, Ali Larter, Hayden Panettiere, Sendhil Ramamurthy, Chris Kattan, dance squad "Diamonds N' Ruff"

45 min

Taye Diggs, Ciara

45 min

Jack Hanna, fitness trainer Bob Harper, Damien Rice

45 min

Emilio Estevez, Mike Holmes

45 min

Mel Gibson, Jo Frost, Mary J. Blige

45 min

William Shatner, Vanessa Marcil

45 min

Edward Norton, Anne Hathaway, The Fray

45 min

Jessica Biel, Shawn and Marlon Wayans

45 min

Dakota Fanning, Adam Beach, Natalie Cole

45 min

Kellie Pickler, Al Gore

45 min

Courteney Cox, John Mayer

45 min

Samuel L. Jackson, Eric Mabius

45 min

Rob Lowe, Nick Graham

45 min

Jerry O'Connell, fitness trainer Bob Harper

45 min

Wesley Autrey, Hilary Swank

45 min

Patrick Dempsey, Indigo Girls, 11-year-old lizard whisperer Lily Capehart

45 min

Nicollette Sheridan, Terri and Bindi Irwin

45 min

Jennifer Love Hewitt, restaurateurs the Scotto family

45 min

The cast of "Little Miss Sunshine"

45 min

Paula Abdul

45 min

T.R. Knight, K.T. Tunstall

45 min

Meredith Vieira, Omarion, personal trainer Bob Harper

45 min

Donald Trump, Milo Ventimiglia

45 min

Steve Harvey

45 min

Judge Judy Sheindlin

45 min

George Lopez

45 min

Julie Andrews

45 min

Wanda Sykes, Jeff Corwin, Ellen's birthday

45 min

David Arquette, Bob Harper, 8-year-old piano prodigy Marc Yu

45 min

D.L. Hughley

45 min

Barbara Walters, Serena Williams, Gym Class Heroes

45 min

Diane Keaton

45 min

Jennifer Lopez

45 min

David Spade

45 min

America Ferrera, Keane, David Frei

45 min

Christina Aguilera

45 min

Rebecca Romijn, Bob Harper

45 min

Gwen Stefani

45 min

Queen Latifah, Jennifer Hudson, Nelly Furtado

45 min

Peter O'Toole, Dominic Monaghan, Keith Barry

45 min

Drew Barrymore, Jason Lewis, Lionel Richie

45 min

Forest Whitaker, Billy Blanks Jr.

45 min

Ryan Phillippe, Bob Harper, Katharine McPhee

45 min

Jimmy Kimmel

45 min

John Legend, John Travolta,

45 min

Jon Abrahams, Augustana, Sandra Bullock, Kyle Collier, Alana Etheridge, Jacob Hays, Laura Marano, Spencer Martin, Julian McMahon

45 min

Gina Glocksen, Corinne Bailey Rae, Leah Remini

45 min

Homaru Cantu, Ice Cube, Tim McGraw

45 min

Pink, Kurt Russell

45 min

Jeff Foxworthy, Patty Griffin, Mark Schulman

45 min

Anthony Hopkins, Stevie Nicks

45 min

Lauren Graham, Phil Stacey, Chris Richardson, Bon Jovi

45 min

Ellen in the Park

45 min

Mike Holmes, Antonio Banderas, Curtis Stone

45 min

Enrique Iglesias, Valerie Bertinelli

45 min

Orlando Bloom, Jason Randal, Joss Stone

45 min

Lin Charlie, Chris Daughtry, Charlie Liu, Debra Messing

45 min

Maroon 5, Katherine Heigl

45 min

Ashley Judd, Travis

45 min

Cheryl Hines, Holly Hunter, Jordin Sparks

45 min