Bill Cosby, a Top Ten List presented by Nicole "Snooki" Polizzi, the Black Keys6Kaley Cuoco, Piers Morgan, Wanda Jackson, Miss Arkansas, Alyse Eady14Matthew Perry, Chris Elliott, Top Ten with Mitt Romney, the National17S.I. Swimsuit Cover Reveal & Top 10, Tom Brokaw, Theophilus London26Forest Whitaker, S.I. Swimsuit Cover Model Irina, Josh Groban, Top Ten with Joy Philbin27Norm Macdonald, CC Sabathia, Willie Nelson, Norah Jones and Wynton Marsalis48Courteney Cox, Aziz Ansari, Alison Krauss & Union Station featuring Jerry Douglas55Dr. Phil McGraw, Chris Hemsworth, Broadway musical "Catch Me If You Can"61Julianna Margulies, Andy Cohen, a Top Ten List presented by Christina Aguilera, White Lies73Kelly Ripa, Jennifer Lawrence, How to Succeed in Business Without Really Trying76Meredith Vieira, Indianapolis 500 winner Dan Wheldon, Drum Solo Week kicks off with Anton Fig82Adm. Michael Mullen, Top Ten by Betty White, Black Joe Lewis & the Honeybears86Ryan Reynolds, chef Eric Ripert and the cast of the Broadway musical Anything Goes87Jason Bateman, Amy Sedaris, Top Ten by Keith Olbermann, Drive-By Truckers91Bono & the Edge, a performance from Spider-Man: Turn Off the Dark102Steve Carell, Hope Solo and Abby Wambach, The Del McCoury Band and the Preservation Hall Band103Denis Leary, Elizabeth Cook, Drum Solo Week II kicks off with Tony Royster Jr.114Kim, Kourtney & Khloe Kardashian, Michael Emerson, The Jim Jones Revue122Michael J. Fox, Top Ten by the cast of Two and a Half Men, Jim McDonald, John Doe124Kaley Cuoco, Skipper Bivins & Trent Jackson, Death Cab for Cutie133Matthew Broderick, horse wrangler Erin Bolster and her horse Tonk, Hunter Hayes141Melissa McCarthy, Anthony Bourdain, Joan Baez & Kris Kristofferson155Robert Pattinson, Annie Leibovitz, David Crosby and Graham Nash156Stupid Humans Tricks, Katie Holmes, Noel Gallagher's High Flying Birds158Steve Martin, Felicity Jones, Lonesome River Band feat. Steve Martin159Scarlett Johansson, Julie Chen, Top Ten by the 2011 Heisman Trophy winner Robert Griffin III173