Actor Daniel Radcliffe; Kings of Leon perform.
TV personality Dr. Phil McGraw; actress Chandra Wilson; Joe Henry performs.
Actor Kelsey Grammer; actor Dan Fogler; the Bravery performs.
Former NFL player Terry Bradshaw; Michael Bublé performs.
Actor Jamie Foxx; TV personality Tim Gunn; Paolo Nutini performs.
Actor Hugh Laurie; TV personality Sherri Shepherd; Editors perform.
Actor Dwayne ``The Rock'' Johnson; presidential candidate Dennis Kucinich (D); Diana Krall performs.
Actress Jennifer Love Hewitt; TV personality Jeff Corwin; Reba McEntire performs with Vince Gill.
Actor Tom Selleck; comic Carlos Mencia; Bobbie and Willie Nelson perform.
Actress Cate Blanchett; filmmaker Tyler Perry; Annie Lennox performs.
Actor Dana Carvey; actress Malin Akerman; Plain White T's perform.
Actress Reese Witherspoon; actor David Koechner; PJ Harvey performs.
Presidential candidate Barack Obama (D); comic Orny Adams; Keith Urban performs.
Actor Russell Crowe; author Jenna Bush; Carrie Underwood performs.
Actor Tom Cruise; presidential candidate Ron Paul (R); Sex Pistols perform.
Actress Eva Mendes; Barry Manilow performs.
Actor Denzel Washington; animal handler Dave Salmoni; LeAnn Rimes performs.
Actor Steve Carell; ballplayer Manny Ramírez; Backstreet Boys perform.
Presidential candidate Mike Huckabee (R-Ark.); chef Emeril Lagasse; Chingy performs with Amerie.
TV personality Howie Mandel; explorer Jason Lewis; Joe Nichols performs.
Animal expert Jarrod Miller; comic John Caparulo; Blake Lewis performs.
Presidential hopeful Ron Paul (R); Shakira performs.
Kids show and tell; TV personality Pamela Anderson; Mary J. Blige performs.
Animal trainer Jules Sylvester; journalist Maria Bartiromo; Finger Eleven performs.
Talk show host Jimmy Kimmel; actor Elon Gold; OneRepublic performs.
Comic Arsenio Hall; the women of TwisterSisters; Seether performs.
Actress Marilu Henner; Jordin Sparks performs.
Comic Bill Maher; choreographers Bruno Tonioli and Carrie Ann Inaba; Taylor Swift performs.
Political analyst Chris Matthews; comic John Roy; Jill Scott performs.
Actor D.L. Hughley; comic The Guy From Boston; Sara Bareilles performs.
Presidential hopeful Mitt Romney; skateboarder Ryan Sheckler; the Jonas Brothers perform.
TV personalities Ryan Seacrest and Simon Cowell (``American Idol''); radio and TV host Tavis Smiley; Shaggy performs.
Journalist David Gregory; talking and singing birds; Puddle of Mud performs.
Animal handler Julie Scardina; comic Chelsea Handler; Buckcherry performs.
Wrestler Hulk Hogan; physics professor David Willey; Natasha Bedingfield performs.
Actor Chazz Palminteri; actress Alison Sweeney; Dierks Bentley performs.
Journalist Lester Holt; baker Marjorie Johnson; Raheem DeVaughn performs.
Animal trainer Dave Salmoni; actor Tom Green; Maroon 5 performs.
Sen. John McCain (R-Ariz.); animal handler Eugene Cussons; Shelby Lynne performs.
Journalist Tom Brokaw; football player Terrell Owens.
Journalist Dan Rather; Mike Rowe (``Dirty Jobs''); Josh Kelley performs.
Actor Stephen Baldwin; ``bug guy'' Brent Karner; J. Holiday performs.
Comic Frank Caliendo; animal handler Eugene Cussons; Flo Rida performs.
Actor Arsenio Hall; chef Paula Deen; James Blunt performs.
Journalist Brian Williams; comic Ahmed Ahmed; Enrique Iglesias performs.
Comic Larry the Cable Guy; coach Bob Knight; Andrea Bocelli performs.
Comic Larry the Cable Guy; choreographer Bruno Tonioli; Glen Hansard and Marketa Irglova perform.
Animal advocate Joan Embery; comic Larry the Cable Guy; Mika performs.
Actor Russell Crowe; comic Larry the Cable Guy; Willie Nelson performs.
Actress Kristen Chenoweth; comic Russell Peters; Lifehouse performs.
Actress Reese Witherspoon; TV host Alex Cambert; Gary Allan performs.
Actor Will Ferrell; actor Hayden Christensen; the Hives perform.
Singer Garth Brooks; actress Christina Ricci.
Supermodel Heidi Klum; actor James McAvoy; John Fogerty performs.
Actor Colin Farrell; television host Bill O'Reilly; Herbie Hancock performs.
Actor Eric Bana; actress Catherine O'Hara; Tift Merritt performs.
Actor Dennis Quaid; actor David Koechner; Lupe Fiasco performs.
Singers Billy Ray and Miley Cyrus; actress Brooke Shields.
Actress Wanda Sykes; actor Bryan Cranston; Cat Power performs.
Dave Salmoni and animals; actress Patricia Arquette; the Punch Brothers perform.
Actor Dominic Monaghan; pianist Ethan Bortnick; Sheryl Crow performs.
Actress America Ferrera; comic Bob Saget; the Blind Boys of Alabama perform.
