Bill Cosby & Toby Keith on 'Leno,' Tina Fey on 'Letterman'

Tina Fey just reminded us, uh, "30 Rock" returns tomorrow...












Wednesday Day:
"Good Morning America": Valerie Bertinelli, Ivanka Trump
"Today": Rosalind Wiseman, Ed Viesturs
"Live with Regis and Kelly": Minnie Driver, Colbie Caillat
"The View": Valerie Bertinelli, Alana Stewart, Jeff Kinney, Five for Fighting
"That Morning Show": Jon Reep, Brenda Song
"The Bonnie Hunt Show": Rachel Bilson, Neil Flynn, Kim Zolciak
"The Ellen DeGeneres Show": Alison Sweeney, the Script
"Rachael Ray Show": John Stamos
"The Oprah Show": Taylor Swift
"The Martha Stewart Show": Rachel Maddow

Wednesday Night:
"The Jay Leno Show": Bill Cosby, Toby Keith
"Late Show with David Letterman": Tina Fey, Chris "Mad Dog" Russo, Mika
"The Tonight Show with Conan O'Brien": Serena Williams, Ken Jeong, Rascal Flatts
"Jimmy Kimmel Live": Jamie Foxx, Toby Keith
"Chelsea Lately": Christian Siriano, John Caparulo, Gary Valentine, Whitney Cummings
"The Late Late Show with Craig Ferguson": Kristen Bell, Robert Carlyle
"Late Night with Jimmy Fallon": Monty Python
"Last Call with Carson Daly": Charlie Hunnam, Phoenix
"Tavis Smiley": Serena Williams
"The Daily Show with Jon Stewart": Barbara Ehrenreich
"The Colbert Report": Amy Farrell, The RZA